If your girl is between sizes, here’s what we recommend:
- UnderSwim: Go up a size — the seal is key for performance.
- Period Swim Bikini Bottoms: Go down — these are cut a little roomier.
- UnderDance: True to size but skews to the larger end of the scale.
- Bumpers Briefs & UnderLiner: Both have a bit of give, so you can choose based on how firm she likes the fit.
Aug 15, 2025