Bra Size Calculator
Results
Sister Sizes
What are Sister Sizes?
Sister sizes are bra sizes with the same cup volume but different band sizes. As the band size goes up, the cup letter goes down, and vice versa. This maintains the same overall volume in the cup.
Example: If your calculated size is 34C, your sister sizes would be 32D and 36B.
Fitting Notes
Bra Style Recommendations
Important Tips
- Always try on bras before purchasing if possible.
- The band should be snug but comfortable on the loosest hook.
- The center gore (between the cups) should lie flat against your chest.
- Adjust the straps for proper support, but they shouldn't dig in.
- Scoop and swoop: Lean forward and scoop all breast tissue into the cups.
1. Measure Your Underbust
➀ Use a soft measuring tape and wear a lightly-lined or unpadded bra that follows the natural shape of your breasts.
➁ Measure around your ribcage directly under your bust in a straight line to get your underbust measurement, which determines your band size.
➂ Ensure the tape is snug around your ribcage. The band provides most of the support, so it needs to be tight.
➃ Keep the tape parallel to the floor by checking yourself in the mirror.
2. Measure Your Overbust
➄ Measure over the fullest part of your bust in a straight line to get your overbust measurement, which determines your cup size.
➅ Hold the tape loosely around the largest part of your breasts.
➆ Keep the tape parallel to the floor. Use a mirror or ask someone to help you.
Bra Size Chart
This chart provides a general reference for bra sizes. The highlighted diagonal shows examples of sister sizes.
| Band Size | AA | A | B | C | D | DD | E | F |
|---|
Note: This chart is for reference only. Bra sizing can vary between brands and styles. Always try on bras for the best fit.