Womens On Performance Flex Bra For running and high-intensity sports. This medium support bra has adjustable straps for ease. No fastening. No underwires. Just top-level support. Key features Sweat-wicking and breathable material Non-removable, light padding No clamping. No underwires. Just top-level support. Adjustable, responsive straps that stay put Offers medium support all the way around each breast Tight, secure fit with high, round neck Reflective logos at the front and back Size Guide Size Bust (cm) Underbust (cm) Cup Size XXS 77 – 79 66.5 – 68.5 60A – 60C XS 79 – 83 68.5 – 71.5 65A‑65C – 70A‑70B S 84 – 88 72 – 76 70C – 75A‑75C M 89 – 93 76 – 80 80A – 80C L 94 – 98 80 – 84 80A⁺ – 80C⁺ XL 99 – 103 84 – 88 85A – 85C How To Measure 1. Bust Measure around the fullest part across bust points, keeping the tape horizontal. 2. Underbust Relax and measure around the top of your ribcage, just under your bust.