Quick answer

Your bra size is a starting point, not a guarantee. Swim tops are sized differently because they use stretch fabrics and simpler sizing. Measure your underbust and fullest bust, then compare those to the swim top's size chart. If you're between sizes, size up for comfort and adjustability. Scoop neck styles like the Scoop Neck Swim Top offer a flexible fit because the double-lined recycled fabric stretches to your shape.

Why bra size and swim top size aren't the same

Bra sizing relies on a precise band and cup system, but swim tops often use alpha sizing (S, M, L) or a simplified numeric scale. That's because swimwear fabric is designed to stretch and recover, so a single size can fit a range of bodies. The trade-off: you lose the fine-tuned cup fit of a bra, but you gain comfort and flexibility. When you're choosing a swim top, focus on band fit first—it should feel snug but not tight—then check that the cups cover what you want without gaping or spilling.

How to measure for a swim top

Use a soft measuring tape. For your underbust, measure directly under your bust, keeping the tape level. For your bust, measure around the fullest part. Write both numbers down. Now compare them to the swim top's size chart, not your bra size. If your underbust is 30 inches and your bust is 34 inches, you might wear a small in one brand and a medium in another. Always check the specific product's chart. For styles like the Scoop Neck Swim Top, the fabric is double lined and stretches, so if you're between sizes, go with the larger one for a more relaxed fit.

Scoop neck swim top fit: what to expect

A scoop neck swim top has a lower, rounded neckline that shows more of your chest. It's a flattering choice for many body types, but the fit depends on your bust size and the top's support. If you have a larger bust, look for a scoop neck with a wider band or adjustable straps—though not all scoop necks have those features. The Scoop Neck Swim Top is designed to be mixed and matched with any swim bottoms in its collection, and its supportive recycled fabric stretches to fit you. If you prefer more coverage, you might want a higher neckline.

When to size up or down

Size up if: you're between sizes, you have a fuller bust, or you prefer a looser fit. Size down if: you have a smaller bust and want a snugger fit, or the size chart suggests you're at the lower end of a size range. Keep in mind that swimwear can relax slightly in water, so a top that feels just right when dry might feel looser when wet. If you're unsure, order two sizes and return the one that doesn't work—many online stores offer free returns.

Adjustability and support features to look for

Not all swim tops are adjustable. Look for features like adjustable straps, hook-and-eye closures, or removable cups if you need extra support. The Scoop Neck Swim Top doesn't list adjustable straps, so if that's a must-have, check the product details before buying. For thong bottoms, the Supima® Cotton Original Rise Thong is known for its flattering V-front and V-back waistband and feel-good fit, and it stretches to adapt to you while maintaining its shape. That kind of adaptive fit is what you want in swimwear too.

Decision rules for choosing your swim top size

  • If your bra band feels tight in swimwear: Swim tops often have less structured bands than bras. If you're used to a snug 34 band, you might prefer a medium in a swim top that runs true to size. Size up if the band leaves marks.
  • If you have a fuller bust: Look for swim tops with wider bands or adjustable straps. The Scoop Neck Swim Top offers stretch, but if you need heavy support, consider a style with underwire or a higher neckline. Prioritize support features over trend.
  • If you're between sizes: Choose the larger size for a relaxed fit or the smaller size for a snugger fit. Remember that swim fabric relaxes in water. When in doubt, size up for comfort.
  • If you prefer a specific coverage level: Scoop neck shows more cleavage; a high neck or square neck offers more coverage. The Scoop Neck Swim Top is a middle ground—feminine flair with moderate coverage. Match the neckline to your comfort zone.

Product facts

  • Scoop Neck Swim Top Palm Springs Sale: Double lined and made with supportive, recycled fabric that stretches to fit you. The stretch means the top accommodates a range of sizes, so if you're between sizes, you can often size down for a snugger fit or stay true to size for comfort.
  • Scoop Neck Swim Top Black Sale: Designed to be mixed and matched with any of the swim bottoms in this collection. You can pair it with different bottoms to adjust coverage and style without worrying about matching sets.
  • Supima® Cotton Original Rise Thong: The Original Rise Thong stretches and adapts to you while maintaining its shape, with one size comfortably fitting a range. This adaptive fit is similar to how swim tops work—focus on the size chart and fabric stretch rather than your bra size.

Who this guide is for

Best for

  • Shoppers who know their bra size but are unsure how to translate it to swimwear
  • Anyone buying a scoop neck swim top for the first time
  • People who want a flexible fit that adapts to their shape

Not for

  • Shoppers who need a precise underwire cup fit
  • Those who prefer a high-coverage or high-neck swim top
  • Anyone looking for a swim top with adjustable straps (check product details first)