Skip to content

My Cart

Your cart is empty

Continue shopping

Armband Size Guide

Upper arm circumference

How to Measure

  1. 1Wrap a flexible tape measure around your upper arm
  2. 2Measure at the fullest part (mid-bicep)
  3. 3Note in inches or centimeters

Size chart

Size Inches cm
Standard Armband 8.5″ – 15.5″ 21.5 – 39 cm
Extra-Long Armband 12.5″ – 18.5″ 31.5 – 47 cm
Both armbands fit most body types.
Additional bra extenders can be purchased at any store if larger sizing is required.

Fertility Q&A

I usually get my period like clockwork - why am I late this cycle?

Periods & Ovulation

I usually get my period like clockwork - why am I late this cycle?

There’s no way to know why your cycle is delayed, but it’s actually ovulation that’s delayed rather than your period, since each woman’s luteal phase length (from ovulation to menstruation) is rela...

Read more