Period Pants & Period Swimwear Size Guide

Choosing the right size ensures comfort, leak-proof performance and confidence - whether you’re buying period underwear or period swimwear. Rather than simply selecting your usual size and hoping it fits correctly, we recommend measuring your hips and waist and checking with our size guide below.

For accurate measurements, remove your outer clothing and stand with your feet together. The tape measure should be snug and even, but not too tight.

Hips: Measure around the fullest part of your hips and bottom. Keep the tape level and relaxed — don’t pull too tight.

Waist: Measure around the narrowest part of your waist, usually just above your belly button.

If your waist and hip measurements fall into different sizes, we generally suggest choosing the size that best matches your hip measurement for the most secure fit.

Should you need any help, please reach out to us here. We're available to help find the best, comfortable fit for you.

Women's size guide