To begin
You’ll need a non-padded or lightly padded underwire bra and soft measuring tape.
We recommend standing in front of a mirror for best results.
FIND YOUR BAND SIZE
- Measure snugly around your ribcage, just below the wire of your bra.
- Use the mirror to make sure the tape is parallel to the floor so it’s not lifting or lowering at your back.
- Note the measurement in inches to find your underbust measurement.
- Use your underbust measurement in the chart below to find your band size.
![](http://www.fredericks.com/cdn/shop/files/desktop-bra-size-guide.jpg?v=1737039553&width=1400)
Measure Your Bust
- Measure around the fullest part of your breast.
- Use the mirror to make sure the tape is parallel to the floor, stretching across your shoulder blades on your back.
- Note this measurement as your bust size.
![Rosalind Lace & Satin Underwire Demi Bra - Frederick's of Hollywood](http://www.fredericks.com/cdn/shop/files/F020-0017.PRBK_04.jpg?v=1730911818&width=1400)
FIND YOUR CUP SIZE
- Subtract the bust measurement from your band size.
- The difference between these numbers reflects your cup size in the chart below.
![](http://www.fredericks.com/cdn/shop/files/desktop-cup-size-guide.jpg?v=1737039553&width=1400)
Please note that bra sizing is an imperfect science. You may find your perfect fit varies based on your body.