Before you start, put on a lightly lined bra — no push-ups or compression sports bras — and grab a soft measuring tape. 

If you don’t have a measuring tape, it’s no big deal. A string and a ruler work too.

STEP 1

l Measure around your ribcage, just beneath your bust. Make sure your measuring tape is parallel to the floor and straight around your back.

l Exhale, and take your measurement.

l Enter the measurement down below, where it says “Underbust Size.”

STEP 2

l Now, measure around the fullest part of your bust. Just like step one, keep the tape parallel to the floor and straight around your back.

l Make sure the tape is comfortably snug, but not too tight.

STEP 3 – Find Your Size

Compare your Bust Measurement and Underbust Measurement.