Calculate your bra size from measurements. Get US, UK, and EU sizes plus sister sizes for the best fit.
US Size
38AA
Band: 38" | Cup: AA
Wrap the tape measure snugly around your ribcage, directly under your bust. The tape should be level all around. Breathe normally and note the measurement.
Wrap the tape around the fullest part of your bust, typically at nipple level. Keep the tape level and don't pull too tight. Wear an unpadded bra for best results.
Recommended Size (US)
38AA
Bust - Band = -2" difference
US Size
38AA
UK Size
38AA
EU Size
95AA
Smaller Band
36undefined
Your Size
38AA
Larger Band
40AA
| Bust - Band Difference | US Cup | UK Cup |
|---|---|---|
| 0" | AA | AA |
| 1" | A | A |
| 2" | B | B |
| 3" | C | C |
| 4" | D | D |
| 5" | DD/E | DD |
| 6" | DDD/F | E |
| 7" | G | F |
| 8" | H | FF |
| 9" | I | G |
Band
Snug and parallel to floor, fits 2 fingers underneath
Center Gore
Lies flat against your sternum
Cups
No spillage, gaps, or wrinkling
Straps
Stay in place without digging into shoulders
Bra size = Band size + Cup size. Measure underbust (band) and fullest part of bust. Band size: round underbust to nearest even number. Cup size: bust minus band measurement determines cup (1"=A, 2"=B, 3"=C, 4"=D, 5"=DD/E). Example: 32" underbust + 36" bust = 4" difference = 32D.
Use a soft measuring tape. For underbust: measure snugly around your ribcage, directly under your bust. For bust: measure around the fullest part of your bust while wearing an unpadded bra. Keep the tape level and not too tight.
Sister sizes have the same cup volume but different band sizes. Going up a band size means going down a cup size, and vice versa. For example, 34C has the same cup volume as 32D and 36B. Use sister sizes to fine-tune your fit.
Bra sizing varies between brands and styles. Many people wear the wrong size due to inconsistent sizing standards. The calculated size is a starting point - try it on and adjust based on fit. The band should be snug but not tight, and cups should fully contain breast tissue.
US and UK use inch-based bands (32, 34, 36...) but differ in cup progression after D. UK adds double letters (DD, E, F, FF, G, GG...). EU uses centimeter bands (70, 75, 80...) and simpler cup letters. Always check the specific brand's size chart.
The band should be snug and parallel to the floor, able to fit two fingers underneath. The center gore should lie flat against your sternum. Cups should fully contain breast tissue without spillage or gaps. Straps should stay in place without digging in.
US Size
38AA
Band: 38" | Cup: AA