Same Body.
Different Size Label.
Swimwear tends to run smaller than everyday bras, and sizing varies more between brands. Enter your regular bra size to get a recommended starting size for bikini tops and swim tops.
- ✓ Results in under a minute, no sign-up needed
- ✓ Accounts for swimwear's tendency to run small
- ✓ Covers underwire and non-wire bikini tops
Estimate your swim top size
Enter your regular bra size.
Why Swimwear Sizing Runs Different
Swim fabric stretches more and offers less structured support than everyday bras, so many people find they need to size up in the band, or choose a style with more coverage, to get equivalent support and coverage in the water. Underwire bikini tops fit closer to true bra sizing, while soft, non-wire triangle tops rely more on tie adjustment than a fixed size.
Frequently Asked Questions
Should I size up for swimwear?
Many people do, especially in the band, since swim fabric offers less structured support than everyday bra fabric.
Do all bikini tops use bra sizing (band+cup)?
No many soft, tie-style tops use general S/M/L sizing instead, so check the specific product's chart.
What if I'm between two sizes?
For underwire styles, size up in the band for comfort; for soft styles, ties usually allow more adjustment either way.