Bra Size Calculator
Find your perfect bra size with accurate measurements across US, UK, and European sizing systems
Calculate Your Bra Size
Measure around the fullest part of your bust while braless
Measure snugly around your ribcage, just under your bust
Fit Analysis
Example Calculation
US Sizing Example
Underbust measurement: 32 inches
Bust measurement: 36 inches
Band calculation: 32 (even) + 4 = 36
Cup calculation: 36 - 32 = 4 inches difference = D cup
Result
Bra Size: 36D (US)
This means a 36-inch band with a D cup
Perfect Fit Checklist
Band Check
Should be level and snug
Provides 80% of support
Cup Check
No spillage or gaps
Tissue should be contained
Gore Check
Center should lie flat
Between the breasts
Sister Sizes
If band is too tight, try larger band + smaller cup
If band is too loose, try smaller band + larger cup
Example: 34C = 36B = 32D
Same cup volume, different band sizes
Understanding Bra Sizing
How Bra Sizing Works
Bra sizing consists of two components: the band size (number) which represents the measurement around your ribcage, and the cup size (letter) which represents the difference between your bust and band measurements.
Perfect Fit Tips
- •The band should provide most of the support
- •Cups should fully contain breast tissue
- •Center gore should lie flat against your chest
Size Conversion Chart
| Difference | US Cup | UK Cup | EU Cup |
|---|---|---|---|
| 1" | A | A | A |
| 2" | B | B | B |
| 3" | C | C | C |
| 4" | D | D | D |
| 5" | DD/E | DD | DD |