About United States Bra Sizing
US sizing uses inches for the band (28, 30, 32...) and a stacked-letter cup system that doubles up letters past D (DD, DDD) before moving to single letters.
United States Band & Cup Reference
Here is the complete band and cup reference for United States sizing alongside the US equivalent for easy conversion.
| United States band | US band equivalent | United States cup letters |
|---|---|---|
| 28 in | 28 | AA · A · B · C · D · DD · DDD · G |
| 30 in | 30 | AA · A · B · C · D · DD · DDD · G |
| 32 in | 32 | AA · A · B · C · D · DD · DDD · G |
| 34 in | 34 | AA · A · B · C · D · DD · DDD · G |
| 36 in | 36 | AA · A · B · C · D · DD · DDD · G |
| 38 in | 38 | AA · A · B · C · D · DD · DDD · G |
| 40 in | 40 | AA · A · B · C · D · DD · DDD · G |
| 42 in | 42 | AA · A · B · C · D · DD · DDD · G |
| 44 in | 44 | AA · A · B · C · D · DD · DDD · G |
Cup Letter Differences
The United States system uses these cup letters in order from smallest to largest:
AA → A → B → C → D → DD → DDD → G → H → I → J → K
How to Convert From United States to Other Systems
To convert your United States bra size to another system, change the band first, then the cup:
- Band conversion: US, UK, IN, and CA all use the same inch-based band.
- Cup conversion: A–D is universal. Past D, US uses DD/DDD, UK uses E/F/FF, and EU/JP/BR use single letters E/F/G or numeric 1/2/3.
Best Brands Sold in United States
Victoria's Secret, ThirdLove, Aerie, Calvin Klein, Soma, and Wacoal are widely available in United States.