Bra Size Calculator
Discover Your True Runderwear Bra Size
80% of women are wearing the wrong bra size. If your sports bra chafes, digs in, rides up or feels unsupportive, fit is usually the problem.The Runderwear Bra Size Calculator helps you find your true size in seconds. No guesswork. No outdated measuring charts. Just accurate sizing designed for running performance.
Because when your bra fits properly, everything changes.
Step 1
Start wearing a non-padded bra, and with a tape measure to hand. Be sure to measure in front of a mirror, or with someone to help you, to follow the next steps, taking your measurements in inches.
Step 2
Wrap the tape around your underbust.
The tape should fit flat against your underbust all the way round, ensuring it doesn’t dip at the back. The tape should feel snug and secure.
Step 3
Wrap the tapearound the fullest partof your bust. The tape should sit flat across your bust, ensuring it doesn’t dip at the back. (The tape should feel snug and secure.)