How do you determine cup size?

Follow these bra fit steps
  1. Measure your band. Wear a lightly lined (non-push-up) bra so your breasts are as close to natural as possible. …
  2. Now measure your bust. Place the tape at the fullest part of your bust. …
  3. Subtract the band size from your bust size to find the right cup size. Every inch equals one cup size up.

How do I know my cup size without measuring?

It is easy to measure your bra size without a tape measure. Use some string or a cord instead of the measuring tape. Wrap the string around your bust first under the bust line, then on the bust line. Note of the exact length with a pen.