Bikini bottom
Side-Cutout Bikini Bottom
- Full coverage
- Sizes S to 2XL
- 13 colourways
4.5 · 3,727 ratings
Official Ocean Blues swimwear catalogue
You cannot try a swimsuit on before the parcel arrives, so every Ocean Blues card says what the photograph cannot: whether the cup is molded, built in or a pad you can take out, whether there is a wire, how much the bottom covers, and which of the two size runs the piece is cut in. Bandeau tops, tummy-control tankinis, athletic one-pieces, long-sleeve suits with a UPF 50+ fabric and board shorts with a real pocket, most of it between fifteen and thirty-five dollars.
Start with what people buy most
Suit 01 · Athletic Boyshort One-Piece01Six shelves
Almost everything here costs between nine and forty dollars, so the price will not decide it. What you are short of will: a top that holds a full cup, a bottom that stays put in a wave, a tankini that covers the middle, a one-piece with sleeves for a whole day in the sun.
02What leaves first
Dealt down this page in three blocks, with the cup, the coverage and the size run on every card before you click.
Bikini bottom
4.5 · 3,727 ratings
Bikini bottom
4.5 · 1,597 ratings
One-piece swimsuit
4.2 · 1,500 ratings
Bikini top
4.3 · 1,130 ratings
03What is inside it
Everything on an Ocean Blues card rests on two decisions: what is holding you up, and how much the piece covers. Both are printed. The label sewn into the suit is the document that governs washing.

A shelf bra sewn into the suit, with the elastic under the bust doing the holding. The athletic one-piece, the twist-front tankini and the zip rash guards are built this way, and it is the cup people with a fuller bust write in about.
A shaped cup that keeps its shape wet: the bandeau tops, the shirred one-piece and the slimming one-piece. Padded means a thinner layer; push-up means the pad is angled. The card names which.
The triangle, the string and the cutout tops. A pocket inside the lining holds a pad, and the pad comes out for the wash or for good. Least hold, most freedom, and the honest default for a top worn to swim in.
All but three pieces in the Ocean Blues collection are wire-free, and the card says so. The three underwire tops, the front-tie, the crisscross and the push-up halter, hold a larger cup up without a strap; the wire-free ones are the ones you can fall asleep in.
| What the card says | What it means in the water | Where it turns up |
|---|---|---|
| Built-in bra | Elastic under the bust does the work; no separate top needed | Athletic one-piece, twist-front tankini, zip rash guards, swim dress |
| Molded cups | A shaped cup that stays shaped when wet | Bandeau tops, shirred and slimming one-pieces, UPF 50+ suit |
| Removable pads | A pad in a pocket; comes out for washing or for good | Triangle, string, cutout and racerback tops |
| Underwire | Holds a full cup up without pulling on the strap | Front-tie top, crisscross top, push-up halter |
| Wire-free | Nothing to dig in; less lift | Every other top, tankini and suit in the range |
| Tummy control | A firmer front panel or a ruched, shirred or loose-fit front | Most tankinis, the shirred one-piece, the high-waisted bottoms |
| UPF 50+ fabric | Lets two percent of UV through the fabric it covers, while it is dry | Long-sleeve boyleg suit, molded-cup zip suit, two pairs of shorts |
| Mesh liner | A lining short under a skirt or a loose short | Swim skirt, seven-inch and three-inch swim shorts |
A cup name describes how a piece holds, not how long it lasts. the Ocean Blues way prints the cup and the coverage on every product page, one under the other.
04On a body, not on a hanger
A zip rash guard at the lake, a shirred bandeau at the pool, a ruched bikini set on a hot afternoon, a swim dress on the boat. What comes out of the parcel, once you are in the water.






05The second block
The shirred tankini with a padded cup, the push-up tankini with a V-neck, the high-cut one-piece that is the cheapest suit on the site, and the eight-inch board shorts with a pocket that closes.
Bikini bottom
4.4 · 863 ratings
Tankini top
4.2 · 606 ratings
Tankini top
4.2 · 465 ratings
Tankini top
4.3 · 461 ratings
06Eight years of the same question
Will it hold, and will it cover what I want covered. Almost everything the Ocean Blues team has cut since 2018 sits somewhere between those two questions.
The first thing we got right was the cup. A swimsuit photographed flat tells you the colour; a swimsuit on a body tells you whether the top is doing any work. So every Ocean Blues card says which of five things is inside it: a built-in bra, a molded cup, a padded cup, a push-up cup or a pad you can take out, and whether a wire runs under it. A woman with a full bust reads that line before she reads the price, and she is right to.
The second thing took longer. A size letter is a promise only if the chart behind it is honest, and a body that is a Large in a bikini bottom is not a Large in a tankini cut with tummy control. So the catalogue runs in two rows of sizes, a regular run from S to 3XL and a plus run from L+ to 4XL+, the card prints which run a piece is cut in, and the buying page carries the chart in inches. The fitting guide lower down this page tells you which four numbers to take before you trust a letter.
What we have not done is spread. Eight years in and everyone at Ocean Blues still works to the same six shelves: bikini tops, tankini tops and sets, bikini bottoms, board shorts and swim skirts, one-piece swimsuits and bikini sets. The prints turn over every season. The shelves do not.
Two different garments. A Large is cut on the regular run, from S to 3XL; a Large Plus is cut on the plus run, from L+ to 4XL+, with more room through the bust and the middle at the same letter. Hold the chart on the buying page against your own tape rather than against the letter you usually buy.
07What you are choosing between
People shop swimwear by photograph and find out afterwards what was inside the top; the people at Ocean Blues print it first. Two rows below go against us: a designer suit outlasts ours, and a suit cut to your measurements is a different product altogether.
| Ocean Blues | Designer swim label | Fast-fashion app | Department store | Athletic swim brand | |
|---|---|---|---|---|---|
| What it costs | Roughly nine to forty dollars a piece | Four to eight times more | About the same | Two to three times more | Two to four times more |
| What the cup is, printed | Built-in, molded, padded, push-up or removable, on the card | Sometimes, under a tab | Rarely | On the hang tag in the shop | Usually a shelf bra, and it says so |
| Wire named before you click | Yes, on every top and one-piece | Yes | Sometimes | On the label in the shop | Almost never a wire |
| Two size runs | Regular S to 3XL and plus L+ to 4XL+, on the card | One run, often stopping at XL | One run | Whatever the rail holds | One run, sized by chest in inches |
| Shot on a body | Every piece, in the colourway sold | Usually, on a model of one size | Sometimes, and not always the same piece | On a hanger as often as not | Yes, mid-stroke |
| The catch | A thirty-dollar suit fades in a season of chlorine | Losing it hurts | The photo and the parcel are cousins | The rail decides the size, not you | Cut to swim laps, not to sit on a lounger |
Prices are the range across this catalogue at our last update; the other four columns describe the category rather than any one shop.
08The part that is not ours to certify
Four pieces in the Ocean Blues range carry a UPF 50+ fabric, and the number is a claim about your skin. It is printed here under what the dermatologists and the federal rules say, rather than as a promise of our own.
A UPF number says how much ultraviolet, UVB and UVA both, a fabric lets reach the skin under it. UPF 50 blocks 98 percent and lets two percent through, and 50 is the lowest rating the Skin Cancer Foundation puts its seal on. Stretched or wet, a fabric loses some of that and turns more transparent: their own example is a white T-shirt that rates about 7 dry and 3 wet.
The Skin Cancer Foundation, read September 4, 2026The American Academy of Dermatology says to look for a UPF number on the label, to prefer dark colours and dense weaves over light shades and open ones, and to remember that dry fabric protects more than wet. Under protective clothing they still want a broad-spectrum, water-resistant sunscreen of SPF 30 or higher on every bit of skin the clothing does not cover, which on a long-sleeve suit is the hands, the neck and the face.
American Academy of Dermatology, read September 4, 2026The Care Labeling Rule requires a washing instruction on every garment in five parts, method and water temperature, bleach, drying, ironing and warnings, with a reasonable basis in evidence for each, and a label that stays attached and legible for the life of the piece. The rinse-after-chlorine line on our cards repeats what the label says; the label wins.
US Federal Trade Commission, read September 4, 2026Most clothing must carry a label naming each fibre by its generic name and its percentage by weight, largest first, plus the country of origin and who made or marketed it. A fibre under five percent is listed as "other fiber" unless it does a job, and the rule's own example is spandex for stretch, which is why a swimsuit label names it.
US Federal Trade Commission, read September 4, 2026This section is general information about sun protection and about how clothing sold in the United States is labelled, not medical advice and not a certificate for any one piece. A UPF number on a card describes the fabric of that piece as our product data carries it, and only the skin the fabric covers while it is dry. Sunscreen on uncovered skin, the hours you spend in the sun and any question about your own skin belong to you and your doctor; the label sewn into the garment is the document that governs washing.
09The rest of the counter
A string-tie triangle top that ties at the neck and the back, the long-sleeve zip suit people buy for the lake, the plus-run halter top in ten colourways, the plus-run boyleg shorts and the high-waisted set that comes in eleven colourways.
One-piece swimsuit
4.5 · 369 ratings
Board shorts
4.5 · 368 ratings
Bikini top
4.3 · 363 ratings
Bikini top
4.4 · 360 ratings
10The brand, in one table
Six shelves, one decision, and it is almost never the one people arrive intending to make.
People come to a swimwear catalogue with a print in mind and leave having changed their mind about the cup. That is not a sales trick; it is what happens when the card says what is inside the top before it says what colour it is. A print is decided in a second and regretted in the water. What holds you up is decided by a tape measure, and the six Ocean Blues shelves are laid out so that the second decision comes first.
The first fork is the water. Forty lengths of a chlorinated pool want a suit that stays put when your arms go over your head, and that is the athletic one-piece and the long-sleeve zip suits with a built-in bra. A day on hot sand wants cover you can take off in halves, and that is a tankini top over a bottom sold on its own. A boat, a lounger and a photograph want a bandeau, and a bandeau is a band and a cup and nothing else, so the band has to fit before anything.


The second fork is the cup. Every top, tankini and one-piece in the Ocean Blues range carries one of five things: a built-in bra, a molded cup, a padded cup, a push-up cup or a pad you can take out, and three tops carry a wire under it. The card names which. A full bust that wants lift reads the wire line first; a bust that wants to be held in place and forgotten reads the built-in bra line; a top bought to swim in reads for the pad that comes out for the wash.
Everything else follows from those two. Bottoms and board shorts are decided by the hip alone, and the inch in the name of a pair of shorts is the inseam. A bikini set is one letter for both halves, so it is sized for the bottom. The plus run, L Plus to 4XL Plus, is cut with more room through the bust and the middle at the same letter, and a piece on it says so on the card rather than in a footnote.
The table below is the whole of it. Find the row that matches the water in your week rather than the row that matches the print you saw, and the shelf is chosen.
| Shelf | What holds you up | Sized by | What actually decides it |
|---|---|---|---|
| Bikini tops | Molded, padded or removable cup; three cuts with a wire | Bust and under-bust | Lift, or hold in place |
| Tankini tops and sets | Molded cup, padded cup or built-in bra; most with tummy control | Bust, and hip for the set | How much of the middle you want covered |
| Bikini bottoms | Nothing to hold; coverage from cheeky to full | Hip only | How much coverage, and whether it ties |
| Swim shorts and skirts | A mesh liner or a built-in bottom | Hip only | The inseam in inches, and a pocket |
| One-piece swimsuits | Built-in bra or molded cup; sleeves and a zip on three | Bust, hip and torso | Laps or lounger, and how much sun |
| Bikini sets | A molded or padded top over a high-waisted bottom | One letter, for the bottom | Whether your two halves are the same letter |
The longer answer to “what is this brand” lives on Read what Ocean Blues makes and who it is for.
11Straight to a piece
Tankini tops, bikini tops and bottoms, one-pieces and the plus run first; the rest are one click away, each page with its pieces, prices, colourways and size runs.
The tankini top is the largest single line Ocean Blues makes, and it is sold without a bottom on purpose: the top is the half that has to hold, so you choose it first and pair it with whichever bottom your hip says. Six of the seven cuts cover the middle, every one carries a cup, and the loose-fit top is cut on the plus run to 4XL+.
Sixteen bikini tops sold without a bottom, and they split by what holds you: five carry a wire, the tie-back bandeau, the push-up halter, the crisscross, the front-tie and the racerback; the rest hold by a molded cup or a removable pad and the band. The triangle halter and the twist front come on the plus run.
Nine bikini bottoms sold on their own, almost all at one price, and the side-cutout among them is the most-rated thing in the whole range. Coverage is the first line on the card, six of the nine are full, and rise is the second; the high-waisted cut on the plus run goes to 2XL+.
The one-piece is the only thing Ocean Blues sells that needs a torso measurement, and the fitting guide says how to take it. The athletic boyshort suit with its built-in bra is the most-rated one-piece in the Ocean Blues range; the shirred bandeau and the slimming suit carry a molded cup; the high-cut low-back is the cheapest suit on the site; two ruched suits come on the plus run.
The plus run is a second set of patterns rather than a bigger letter: a Large Plus is cut with more room through the bust and the middle than a Large, and the card says which run a piece is on. The loose-fit tankini top goes to 4XL+, the triangle halter to 3XL+, and two ruched one-pieces, a bottom and a pair of boyleg shorts fill out the rest.
12Before you click
The commonest mistake is buying the letter you wear in jeans. Take four numbers once, hold them against the chart on the buying page, and the Ocean Blues catalogue turns into a filter.
Tape level and snug where a bra band sits, breathing out. This is the number a built-in bra and an underwire top are cut to: the band does the holding, and a band that is loose by an inch lets the cup ride up when you swim.
Tape level, not pulled tight, over nothing or over the swimsuit you own. The difference between this number and the one under the bust is what decides between a molded cup and a removable pad, and the chart on the buying page lists the bust in inches.
Feet together, tape around the fullest part of the seat. A bikini bottom, a pair of board shorts and a swim skirt are all decided by this number and by nothing else, and it is the one most people guess.
From the top of one shoulder, down the front between the legs and back up to the same shoulder. A one-piece or a swim dress that is right at the hip and short in the torso pulls at the shoulder all day; the chart for the one-pieces gives this length, and no other piece needs it.
The regular run goes S to 3XL and the plus run L+ to 4XL+, and a Large is not a Large Plus. The plus run is cut with more room through the bust and the middle at the same letter, and the card says which run an Ocean Blues piece is cut in.
Swim fabric stretches, and a suit that is tight dry is tighter wet. The ruched, shirred and loose-fit fronts forgive the smaller letter; a bandeau, a molded cup and an underwire do not, because a cup that is too small shows at once. Size a set for the bottom.
13In their words
Printed as they came, with the piece each one names linked underneath. Three of them are complaints, and those are the three worth reading twice.
★★★★★
Im a 36 DD. Normally buy a large in shirts and a 12 or 14 in bottoms. I bought this is a large. This fit nearly perfect in the bust. Didn’t love that you could see the lining cups, created a weird line but the top stayed up and was supportive which was very impressive. The side wire did dig and irritate some after wearing a couple hours. As far as the fabric under the bust, I’m not super hippy but still have an hour glass shape. This lower fabric was loose and a little long which I normally love (and didn’t mind) but a medium would have been more flattering around my waist (but then it would have been too small in the bust).
★★★★☆
This is a great little pair of swim bottoms! For reference I am 5'7" and go between 140-150lbs. I bought size small and they are great! The side ties are flattering and can be adjusted about 1". I bought my first pair in May of 2021 and they are just now starting to "stretch" out from a chlorine pool. The inner lining is NOT stretching out, but the outer lining is starting to show wear. Not bad for 2 years! I recently ordered 2 more black and 1 leopard print. The leopard is adorable with a solid black top! These are my "go to" bottoms with ANY top that I like.
★★★★☆
Comfortable! So, I wanted a swimsuit that would allow me to play with my daughter at the beach without feeling like something was going to fall out. I wanted to be comfortable and not self conscious. I am a little under 5'1" and 150 lbs on the curvier side. I'm also a 36C. The medium fit perfect. The only thing about this suit is that it does a weird thing at the lower abdomen, I noticed this in the pictures of others as well. That can make it a little less flattering for us with a little pooch. However, it's REALLY comfortable. The price was good too and the material is thick.
★★★★★
These Ocean Blues Board Shorts are a winner for me. I ordered according to the size chart, which is different than my normal size, and they fit great. I like the shirred sides because I think they're more stylish. Shorts work better for me than a swim skirt for paddle boarding, kayaking, and swimming. I hate it when swim skirts float up and with these shorts that isn't an issue. I wear these shorts with different styles of tops, including bikini and tankini styles and they look good! They are cute, comfortable, and affordable, so I ordered an extra pair for a vacation trip.
★★★★★
This top has held up so well, I wash it after every use and I have been using it for at least 3 months twice a week. The padding doesn't shift even after washing. I haven't experienced any color fading, I have received many compliments and for the price, it was a steal! The size fits well and is true to size.
★★★★☆
Well made and matches other royal blue swimwear I have from other various brands, but the ribcage size is a little big on me. I generally wear a 30D, so if you have a smaller band size, it won’t hold you in as well as you might want for activity.
★★★★☆
Small and medium both fit well with the medium offering more coverage in back. I like side-tie bottoms because of the adjustability. Smalls offer more cheekiness without being too tight around the hips, and mediums will be more modest when necessary. Fully lined. Well made especially for the price. Hope they last a while.
★★★★★
These are very stylish, they fit comfortably and can be worn as bicycle shorts for when riding around before the pool. Great deal.
★★★★★
SIZING! I am a 32DDD. The “recommended size” for my measurements was a small, but…based on reviews I went with a large and I’m so glad I did! Size up!!! I’m giving it 5 stars, because it will eventually be…as soon as the shape of the foam sorts itself out. It had a price tag that has a much higher number than what I paid.
14Swim Notes
Which Ocean Blues cup holds what, how to read the two size runs when you are between letters, what a UPF number is and is not, and what a season of pool water does to a thirty-dollar suit.
Bust, underbust and hip, taken once with a tape, and which of the three decides each piece. What the regular run and the plus run are cut for, what a tie, a drawstring or a slider can take up, and what to do when the numbers land in two letters.
Forty lengths of a chlorinated pool, a day on hot sand, an aqua class with the arms overhead, a water park with children, a kayak seat. Each asks something different of a swimsuit, and the three cuts answer differently. Which piece we would reach for first, and why.
What a UPF 50+ rating measures and what it leaves out, why a wet or stretched fabric lets more through, what chlorine and salt do to a nylon and spandex blend, what the care label sewn into a US garment has to say by law, and the wash we recommend, step by step.
The words on the tag promise a result; the cut can only do a job. What ruching, shirring, a double lining, a blouson body and a high waistband each do to the fabric, which Ocean Blues pieces use which, and how to tell from the description whether a piece has the construction the tag implies.
15Questions people send us
Six of them. Longer answers live on the shelf pages and in Swim Notes.
Every buying button on this site opens the piece you were looking at, in the colourway you chose, at our retail partner. That is where you pick the size, where the payment, the delivery and any exchange happen, and the price you see there is the price you pay.
If you would rather see the whole range in one go, the button at the foot of every page opens the catalogue rather than a single suit.
Take four numbers once, under the bust, around the bust, the hip and, for a one-piece, the torso, and hold them against the chart on the buying page rather than against the letter you wear in jeans. Then pick the run: the regular run goes S to 3XL and the plus run L+ to 4XL+, and a Large Plus is cut roomier through the bust and the middle than a Large. Between two letters, take the larger, because swim fabric is tighter wet than dry.
All but three pieces here are wire-free, and the card says which cup is doing the work instead: a built-in bra, a molded cup, a padded cup, a push-up or a pad you can take out. A built-in bra and a molded cup hold a full bust in place; what they do not do is lift it. For lift, the three bikini tops with an underwire are listed on their own page, led by the push-up halter.
Mostly not, on purpose. The bikini tops, the tankini tops and the bottoms are sold alone, so a body that is a Large above and a Medium below buys each half in its own letter and matches the colourway across the shelves. Six pieces are sold as a pair, three bikini sets and three tankini sets, sized as one letter for both halves.
No. Four pieces carry a UPF 50+ fabric, two long-sleeve zip suits and two pairs of board shorts, and the number means the dry fabric lets two percent of ultraviolet through to the skin it covers. It says nothing about the hands, the face, the neck or the legs below the hem, where the dermatologists still want a broad-spectrum sunscreen of SPF 30 or higher, and a wet or stretched fabric loses some of its rating. The sources we read on this are linked lower on the page.
By the label sewn into it, which under United States rules must carry a washing instruction and any warning the piece needs. As a rule of thumb, rinse it in cool water as soon as you are out of the chlorine or the salt, wash it gently, take the pad out of a removable-pad top first, and dry it flat out of the sun rather than wringing it. The label wins over the rule of thumb every time.
Every Ocean Blues size, every colourway
Every size, colourway and set in the Ocean Blues edit sits behind this button, with the price from our last update against each one.