Swimwear
How to Choose Swimwear by Body Type, Not Just Size
Most swimwear shopping starts and ends with a size on a tag — but a swimsuit that's "your size" can still fight your shape or leave your bust unsupported. Choosing swimwear by body type, and by cup size, is what actually gets you a suit that fits the way you want it to.
Why Size Alone Doesn't Guarantee the Right Fit
A small, medium, or large is really just an average — it assumes a certain bust-to-waist-to-hip ratio that most bodies don't actually have. Two people wearing the same "medium" swimsuit can have completely different proportions, which is why the same suit can look and feel totally different on each of them.
Body type tells you which necklines, cuts, and details will balance your proportions. Cup size tells you whether the bust actually has the support and coverage it needs. You need both to get it right — not just a number on a tag.
What Body Shape Are You?
Compare your shoulders, bust, waist, and hips to find the closest match, then use it as a starting point for styles to try.
Hourglass
Shoulders and hips are similarly proportioned with a clearly defined waist. The goal is to maintain that waist definition rather than hide it.
Try: wrap or belted one-pieces, underwire bikini tops that follow your natural shape, and mid-to-high-waisted bottoms that sit at the narrowest part of your waist.
Shop tankinis →
Pear / Triangle
Hips are wider than shoulders and bust. The goal is to draw the eye upward and add a little visual balance through the hips.
Try: bold or embellished bikini tops, bandeau or halter styles that widen the shoulder line, and high-waisted or full-coverage bottoms rather than skimpy cuts.
Shop bikini bottoms →
Apple / Round
Fuller through the midsection, often with a fuller bust and slimmer legs. The goal is to define the waist and support the bust rather than cling to the middle.
Try: underwire one-pieces with ruching or shirring at the midsection, empire-line tankinis, and structured bikini tops rather than soft triangle shapes.
Shop one-piece swimwear →
Inverted Triangle
Shoulders and bust are broader than the hips. The goal is to minimize the shoulder line and add a little volume through the hips.
Try: one-shoulder or asymmetrical bikini tops with minimal hardware, and bottoms with side detailing, ruffles, or a slightly fuller cut through the hip.
Rectangle / Athletic
Shoulders, waist, and hips are similarly proportioned with little natural waist definition. The goal is to create curves rather than hide them.
Try: ruched or belted one-pieces, bikini tops with ruffles or peplum detail, and bottoms with side ties or cut-outs to add shape at the hip.
Why Cup Size Matters Just as Much as Shape
Generic S/M/L bikini tops are sized for an average bust — which means anyone above or below that average is either unsupported or swimming in extra fabric, regardless of how well the style suits their body shape.
That's why BraTopia carries cup-sized swimwear — bikini tops and one-pieces in true band and cup measurements, the same way you'd shop for a bra. Read more in The Power of Having Swimwear by Cup Size and Cup-Sized Swimwear & Sportswear.
Shop bikini tops →
If you're fuller-busted, curvier overall, or shopping plus size, the same rule applies twofold — shape guides the style, cup size guides the support. Browse plus size swimwear for styles built with both in mind.
Common Swimwear Shopping Mistakes
Avoid these when swimsuit shopping:
- Buying by S/M/L alone instead of checking band and cup measurements for tops
- Choosing a style because it's trending, without checking it suits your shape
- Assuming your swim size matches your everyday bra size exactly — swim fabric and cut vary by brand
- Sizing up "just in case" instead of trying true-to-size cup coverage
- Skipping a trial fitting because swimwear feels lower-stakes than lingerie
When to Get Fitted Instead of Guessing
If you've never checked your measurements against a real size chart, or you're shopping a fuller bust, plus size, or a new brand for the first time, a fitting removes the guesswork. Start with our measurement guide or size chart, or come in for a proper fitting — the same fit principles from Top Signs Your Bra Doesn't Fit apply just as much to swimwear as everyday bras.
Get Fitted for Swim Season
Our certified fitters can confirm your true swim size and recommend cup-sized styles suited to your shape — no guesswork, no judgment.
Book Your Free FittingFrequently Asked Questions
How do I know my body shape for swimwear shopping?
Compare the width of your shoulders, bust, waist, and hips. Similar shoulders and hips with a defined waist is an hourglass. Wider hips than shoulders is a pear. Fuller through the middle is an apple. Broader shoulders than hips is an inverted triangle. Similar measurements throughout with little waist definition is a rectangle.
Does cup size matter when buying a swimsuit?
Yes, just as much as body shape. Generic S/M/L swim tops are built for an average cup size, so fuller busts often get better support and a better silhouette from bra-sized swimwear that comes in true band and cup measurements.
What's the best swimsuit for a fuller bust?
Look for underwire bikini tops or one-pieces sold in true bra sizes (band and cup), wider straps, and full-coverage cups. These distribute weight properly instead of relying on stretch fabric alone.
What swimwear works best for a pear-shaped body?
Draw the eye upward with bold or embellished bikini tops, and balance the hips with high-waisted or full-coverage bottoms. One-pieces with waist detailing also work well.
Can I buy swimwear in my actual bra size?
Yes. BraTopia carries cup-sized swimwear in true band and cup measurements, not just S/M/L, so you can shop swim tops the same way you shop bras.
What should apple-shaped bodies look for in a swimsuit?
Look for styles that define the waist and support the bust, such as underwire one-pieces with ruching at the midsection, empire-line tankinis, or bikini tops with structure rather than a soft triangle shape.
Do I need a professional fitting for swimwear too?
It helps just as much as it does for everyday bras. Swim fabric behaves differently than bra fabric, and a fitter can confirm your true swim size and recommend styles suited to your shape.
Where can I get fitted for swimwear in Calgary?
BraTopia offers free 1:1 fittings with certified fitters at our Bridgeland, Calgary location, including swimwear fittings. Book an appointment online.
