TL;DR: Bra-sized swimwear starts from your real cup and band size, so a 36DD top fits like a 36DD bra. For a fuller bust, choose underwire and wide straps. For more coverage or a smoother line, pick a one-piece with a control panel. On hot days, look for quick-dry fabric and UPF 50+ sun protection. Match the style to your proportions and the weather, and the swimwear does the work, so you think about the water, not your costume.
Table of Contents
- 1.How do you choose swimwear for your body shape?
- 2.What is the best swimwear for a larger bust?
- 3.What should you look for in plus-size swimwear?
- 4.How do you stay cool in swimwear on hot days?
- 5.How does shaping swimwear smooth your silhouette?
- 6.How do you find the right swimwear size?
- 7.How do bra sizes convert between UK and EU swimwear?
- 8.Your summer, your shape
- 9.Frequently Asked Questions
Swimwear shopping has a way of going wrong in the fitting room: a top that gapes, a band that rides up, a costume that fits nowhere quite right. The fix is swimwear built from your real measurements. Triumph sizes its swim in cup and band sizes, so a 36DD top fits like a 36DD bra, with the support and ease you feel in a bra that actually fits.
That fit is what makes the difference. In a 2024 Triumph swimwear survey, 81% of women who switched to bra-sized swimwear said they felt more confident at the beach or pool. This guide covers how to choose for your shape, your size and a hot day.
How do you choose swimwear for your body shape?
The easiest way to choose swimwear is to start from what you want the fit to do, not a body-type label. Decide where you want more support, more coverage, or a cleaner line, and the style follows. Separates make it simple: you size the top for your bust and the bottom for your hips.
This table pairs what you want from the fit with the style that delivers it:What you want Style to choose Why it works More lift and support for the bust Underwired bikini top or balcony swimsuit Structured cups and wire hold and lift More coverage on the hips and seat High-waist briefs or a one-piece Sits higher and stays put when you move A smoother line through the middle Control one-piece with a front panel Firms gently without squeezing Balance for a fuller bust and narrower hips Mix-and-match separates Size the top and bottom separately Fewer tan lines Bandeau top or low-back swimsuit Less fabric, more even sun
Key Takeaway: Choose by what you want the fit to do. Separates let you size the top and bottom for two different parts of you.
What is the best swimwear for a larger bust?
For a larger bust, the best swimwear is a bra-sized top with real underwire. It holds and lifts the way your everyday bra does, instead of flattening the bust or leaving it loose. Triumph builds its swim tops in a wide range of cup sizes, using the same full-bust construction as its fuller cup bras.
- Full underwire that follows the breast crease and encases the cup
- Wide, adjustable straps that carry the weight without cutting in
- Side support panels that keep the bust forward and centred
- A firm underband with hook-and-eye fastening, so you can set the fit
- Higher-cut cups that hold everything in place when you swim or reach
Our bra-sized swimwear guide goes deeper on construction. If you wear a D cup or above, this is the difference between adjusting your top all afternoon and forgetting you have it on.
Key Takeaway: For a larger bust, structure matters more than style. Underwire, wide straps and a firm band are what keep everything secure.
What should you look for in plus-size swimwear?
Plus-size swimwear should give you the same structure and choice as any other size: bra-sized cups, a band that holds without digging in, and fabric with real stretch and recovery. Coverage is a preference, not a rule, so pick the amount of skin you want on show, then choose for the support underneath.
- Bra-sized cups rather than vague S to XL sizing
- Power-mesh lining that smooths and supports without stiffness
- Wide, set-back straps that stay on the shoulder
- Bonded or covered seams that sit flat against the skin
- Two-way stretch fabric that holds its shape after sun, salt and chlorine
Key Takeaway: Plus-size swimwear should offer real structure and the full range of styles. Bra sizing, a firm band and good fabric recovery do the work.
How do you stay cool in swimwear on hot days?
On a hot day, the swimwear that stays comfortable is quick-dry and breathable, with UPF 50+ sun protection that blocks around 98% of UV radiation. Thick padding is what traps heat, so lighter, perforated fabric usually feels cooler, whatever the cut.
- Quick-dry fabric that does not stay heavy and cold after a swim
- UPF 50+ fabric for built-in sun protection across the covered areas
- A breathable lining rather than thick padding, which traps heat
- Adjustable straps and sides you can loosen as the day warms up
- Chlorine- and salt-resistant fabric that holds its shape and colour through the season
Rinse swimwear in cool fresh water after every wear, since salt, chlorine and sun cream break down the elastane that keeps the band firm and the colour true.
Key Takeaway: Stay cool with quick-dry, breathable fabric and UPF 50+ sun protection. Padding holds heat, so go lighter on a hot day.
How does shaping swimwear smooth your silhouette?
Shaping swimwear smooths your silhouette with built-in control panels, usually a layer of power mesh sewn into the front lining of a one-piece. It firms the waist and tummy gently, so the smoothing comes from the construction, not from squeezing into a smaller size.
- A front control panel that firms the tummy without pinching
- Ruching at the sides that skims rather than clings
- A higher leg that lengthens the line of the leg
- Moulded cups that shape the bust to match
Key Takeaway: Shaping swimwear smooths through built-in panels, not a tighter size. It should feel like gentle support you can forget you are wearing.
How do you find the right swimwear size?
Start with your current bra size. In bra-sized swimwear, a 34D bra is a 34D top, because the band and cup share the same measurements. If you have not measured in six months, check with Triumph's bra size calculator first, then fine-tune for the wet fit.
- Measure first. Use your current bra size as the starting point, and re-measure if it has been a while.
- Mind the band when wet. Swim fabric can feel tighter wet. If you are between bands, take the larger one.
- Check the cup. It should hold the bust fully, with no spilling at the top or gaping at the side.
- Set the straps. Tighten for swimming, loosen for lying in the sun.
Key Takeaway: Begin with your bra size, then fine-tune. Go up a band if you are between sizes, because swimwear holds tighter when wet.
How do bra sizes convert between UK and EU swimwear?
Swimwear sizing uses the same band-and-cup system as bras, but the labels change by region, so a UK 34G and an EU 75 are written differently. Convert your size before buying across brands, then check the brand's own size chart, because cup letters differ most above a D cup. Triumph's own fuller-cup range runs up to a G cup, and it writes the fifth cup as DD/E, which is the EU E.
This chart converts the common band and cup sizes (a general guide, always confirm against the size chart):Measure UK EU (DE) Band 32 70 Band 34 75 Band 36 80 Band 38 85 Cup D D Cup DD E Cup E F Cup F G Cup FF H Cup G I
So a UK 34DD swim top is roughly an EU 75E, and an EU 80G converts to about a UK 36F. If you fall between the two systems, size by the band first and adjust the cup on the chart. Not sure of your starting size? Triumph's bra size calculator gives you the band and cup to convert from.
Key Takeaway: Convert the band first, then the cup, and confirm on the brand's size chart. Cup letters diverge above a D cup, so a UK G is not the same label as an EU G.
Your summer, your shape
Getting ready for the beach should feel like the easy part of summer. When the swimwear fits, you stop checking your straps and start enjoying the water. Triumph has engineered fit in Germany for generations, and its swimwear carries the same expertise as its bras, so browse the swimwear collection or last year's styles in the swimwear sale, and choose for the body you are in.
Frequently Asked Questions
A one-piece with a front control panel. The panel firms the middle gently, while ruching at the sides skims rather than clings. Choose the size you can wear comfortably all day, since a too-small suit shapes less, not more.What swimwear is best for a tummy?
Yes. Triumph makes bikini tops in cup and band sizes, like 34D or 38DD, with underwire and adjustable straps. A bra-sized top fits and supports the way your everyday bra does.Can you get bikini tops in bra sizes?
Mix-and-match separates. Size the top for your bust, with underwire and wide straps, and take the briefs in the size that fits your hips. Buying the two parts separately is the easiest way to fit both.What swimwear suits a fuller bust and narrower hips?
Both work, and the choice is about coverage, not size. A high-leg one-piece, a tankini and a full-coverage bikini all come in larger sizes at Triumph. Pick the coverage you want, then check the support underneath.Is a one-piece or a bikini better for plus sizes?
The band is usually too loose or too big. It should sit level and firm around the ribcage, doing most of the support work. If it rides up, try a smaller band with a larger cup.How do I stop my bikini top riding up at the back?
UPF stands for Ultraviolet Protection Factor, the fabric equivalent of SPF. A UPF 50+ rating means the fabric blocks around 98% of UV radiation across the areas it covers.What does UPF mean in swimwear?
TL;DR: Bra-sized swimwear starts from your real cup and band size, so a 36DD top fits like a 36DD bra. For a fuller bust, choose underwire and wide straps. For more coverage or a smoother line, pick a one-piece with a control panel. On hot days, look for quick-dry fabric and UPF 50+ sun protection. Match the style to your proportions and the weather, and the swimwear does the work, so you think about the water, not your costume.
Table of Contents
- 1.How do you choose swimwear for your body shape?
- 2.What is the best swimwear for a larger bust?
- 3.What should you look for in plus-size swimwear?
- 4.How do you stay cool in swimwear on hot days?
- 5.How does shaping swimwear smooth your silhouette?
- 6.How do you find the right swimwear size?
- 7.How do bra sizes convert between UK and EU swimwear?
- 8.Your summer, your shape
- 9.Frequently Asked Questions
Swimwear shopping has a way of going wrong in the fitting room: a top that gapes, a band that rides up, a costume that fits nowhere quite right. The fix is swimwear built from your real measurements. Triumph sizes its swim in cup and band sizes, so a 36DD top fits like a 36DD bra, with the support and ease you feel in a bra that actually fits.
That fit is what makes the difference. In a 2024 Triumph swimwear survey, 81% of women who switched to bra-sized swimwear said they felt more confident at the beach or pool. This guide covers how to choose for your shape, your size and a hot day.
How do you choose swimwear for your body shape?
The easiest way to choose swimwear is to start from what you want the fit to do, not a body-type label. Decide where you want more support, more coverage, or a cleaner line, and the style follows. Separates make it simple: you size the top for your bust and the bottom for your hips.
This table pairs what you want from the fit with the style that delivers it:What you want Style to choose Why it works More lift and support for the bust Underwired bikini top or balcony swimsuit Structured cups and wire hold and lift More coverage on the hips and seat High-waist briefs or a one-piece Sits higher and stays put when you move A smoother line through the middle Control one-piece with a front panel Firms gently without squeezing Balance for a fuller bust and narrower hips Mix-and-match separates Size the top and bottom separately Fewer tan lines Bandeau top or low-back swimsuit Less fabric, more even sun
Key Takeaway: Choose by what you want the fit to do. Separates let you size the top and bottom for two different parts of you.
What is the best swimwear for a larger bust?
For a larger bust, the best swimwear is a bra-sized top with real underwire. It holds and lifts the way your everyday bra does, instead of flattening the bust or leaving it loose. Triumph builds its swim tops in a wide range of cup sizes, using the same full-bust construction as its fuller cup bras.
- Full underwire that follows the breast crease and encases the cup
- Wide, adjustable straps that carry the weight without cutting in
- Side support panels that keep the bust forward and centred
- A firm underband with hook-and-eye fastening, so you can set the fit
- Higher-cut cups that hold everything in place when you swim or reach
Our bra-sized swimwear guide goes deeper on construction. If you wear a D cup or above, this is the difference between adjusting your top all afternoon and forgetting you have it on.
Key Takeaway: For a larger bust, structure matters more than style. Underwire, wide straps and a firm band are what keep everything secure.
What should you look for in plus-size swimwear?
Plus-size swimwear should give you the same structure and choice as any other size: bra-sized cups, a band that holds without digging in, and fabric with real stretch and recovery. Coverage is a preference, not a rule, so pick the amount of skin you want on show, then choose for the support underneath.
- Bra-sized cups rather than vague S to XL sizing
- Power-mesh lining that smooths and supports without stiffness
- Wide, set-back straps that stay on the shoulder
- Bonded or covered seams that sit flat against the skin
- Two-way stretch fabric that holds its shape after sun, salt and chlorine
Key Takeaway: Plus-size swimwear should offer real structure and the full range of styles. Bra sizing, a firm band and good fabric recovery do the work.
How do you stay cool in swimwear on hot days?
On a hot day, the swimwear that stays comfortable is quick-dry and breathable, with UPF 50+ sun protection that blocks around 98% of UV radiation. Thick padding is what traps heat, so lighter, perforated fabric usually feels cooler, whatever the cut.
- Quick-dry fabric that does not stay heavy and cold after a swim
- UPF 50+ fabric for built-in sun protection across the covered areas
- A breathable lining rather than thick padding, which traps heat
- Adjustable straps and sides you can loosen as the day warms up
- Chlorine- and salt-resistant fabric that holds its shape and colour through the season
Rinse swimwear in cool fresh water after every wear, since salt, chlorine and sun cream break down the elastane that keeps the band firm and the colour true.
Key Takeaway: Stay cool with quick-dry, breathable fabric and UPF 50+ sun protection. Padding holds heat, so go lighter on a hot day.
How does shaping swimwear smooth your silhouette?
Shaping swimwear smooths your silhouette with built-in control panels, usually a layer of power mesh sewn into the front lining of a one-piece. It firms the waist and tummy gently, so the smoothing comes from the construction, not from squeezing into a smaller size.
- A front control panel that firms the tummy without pinching
- Ruching at the sides that skims rather than clings
- A higher leg that lengthens the line of the leg
- Moulded cups that shape the bust to match
Key Takeaway: Shaping swimwear smooths through built-in panels, not a tighter size. It should feel like gentle support you can forget you are wearing.
How do you find the right swimwear size?
Start with your current bra size. In bra-sized swimwear, a 34D bra is a 34D top, because the band and cup share the same measurements. If you have not measured in six months, check with Triumph's bra size calculator first, then fine-tune for the wet fit.
- Measure first. Use your current bra size as the starting point, and re-measure if it has been a while.
- Mind the band when wet. Swim fabric can feel tighter wet. If you are between bands, take the larger one.
- Check the cup. It should hold the bust fully, with no spilling at the top or gaping at the side.
- Set the straps. Tighten for swimming, loosen for lying in the sun.
Key Takeaway: Begin with your bra size, then fine-tune. Go up a band if you are between sizes, because swimwear holds tighter when wet.
How do bra sizes convert between UK and EU swimwear?
Swimwear sizing uses the same band-and-cup system as bras, but the labels change by region, so a UK 34G and an EU 75 are written differently. Convert your size before buying across brands, then check the brand's own size chart, because cup letters differ most above a D cup. Triumph's own fuller-cup range runs up to a G cup, and it writes the fifth cup as DD/E, which is the EU E.
This chart converts the common band and cup sizes (a general guide, always confirm against the size chart):Measure UK EU (DE) Band 32 70 Band 34 75 Band 36 80 Band 38 85 Cup D D Cup DD E Cup E F Cup F G Cup FF H Cup G I
So a UK 34DD swim top is roughly an EU 75E, and an EU 80G converts to about a UK 36F. If you fall between the two systems, size by the band first and adjust the cup on the chart. Not sure of your starting size? Triumph's bra size calculator gives you the band and cup to convert from.
Key Takeaway: Convert the band first, then the cup, and confirm on the brand's size chart. Cup letters diverge above a D cup, so a UK G is not the same label as an EU G.
Your summer, your shape
Getting ready for the beach should feel like the easy part of summer. When the swimwear fits, you stop checking your straps and start enjoying the water. Triumph has engineered fit in Germany for generations, and its swimwear carries the same expertise as its bras, so browse the swimwear collection or last year's styles in the swimwear sale, and choose for the body you are in.
Frequently Asked Questions
A one-piece with a front control panel. The panel firms the middle gently, while ruching at the sides skims rather than clings. Choose the size you can wear comfortably all day, since a too-small suit shapes less, not more.What swimwear is best for a tummy?
Yes. Triumph makes bikini tops in cup and band sizes, like 34D or 38DD, with underwire and adjustable straps. A bra-sized top fits and supports the way your everyday bra does.Can you get bikini tops in bra sizes?
Mix-and-match separates. Size the top for your bust, with underwire and wide straps, and take the briefs in the size that fits your hips. Buying the two parts separately is the easiest way to fit both.What swimwear suits a fuller bust and narrower hips?
Both work, and the choice is about coverage, not size. A high-leg one-piece, a tankini and a full-coverage bikini all come in larger sizes at Triumph. Pick the coverage you want, then check the support underneath.Is a one-piece or a bikini better for plus sizes?
The band is usually too loose or too big. It should sit level and firm around the ribcage, doing most of the support work. If it rides up, try a smaller band with a larger cup.How do I stop my bikini top riding up at the back?
UPF stands for Ultraviolet Protection Factor, the fabric equivalent of SPF. A UPF 50+ rating means the fabric blocks around 98% of UV radiation across the areas it covers.What does UPF mean in swimwear?
For over 140 years, Triumph has created products designed to inspire beautiful feelings. Rooted in femininity, shaped by thoughtful design, and expressed with modernity, our lingerie helps every woman feel at ease in herself. We believe true beauty is a feeling that comes from harmony with the body and confidence in one's own femininity. At Triumph, we create the conditions for beautiful feelings to flourish. Because the greatest beauty is already hers. We simply help her feel it.
For over 140 years, Triumph has created products designed to inspire beautiful feelings. Rooted in femininity, shaped by thoughtful design, and expressed with modernity, our lingerie helps every woman feel at ease in herself. We believe true beauty is a feeling that comes from harmony with the body and confidence in one's own femininity. At Triumph, we create the conditions for beautiful feelings to flourish. Because the greatest beauty is already hers. We simply help her feel it.