One Piece Period Swimsuit for Teens Size Guide

The perfect size is one size bigger than the one you already wear!

If you are not sure about your size, we recommend you choose one size bigger than your usual panty size. Discover freedom without marks! Our menstrual panties fit like a glove, adapting to your body without leaving a trace.

If you don't pick the perfect size, we will exchange it for free. 

If you still want to be sure, we recommend that you measure your hip as shown in the following picture.