US chart
Use this US bra size chart as a reference for common band sizes, cup labels, and measurement ranges. Sizing can vary by brand, so treat the chart as a starting point and confirm with fit checks.
US band sizes usually increase in two-inch steps. Measure snugly around the ribcage under the bust, then compare that number with the band range.
| US Band Size | Underbust Range | Fit Note |
|---|---|---|
| 30 | 26-27 in | Petite band range |
| 32 | 28-29 in | Common smaller band |
| 34 | 30-31 in | Common medium band |
| 36 | 32-33 in | Medium plus band |
| 38 | 34-35 in | Fuller band range |
| 40 | 36-37 in | Extended band range |
| 42 | 38-39 in | Extended band range |
Cup size is estimated from the difference between bust and band measurements. US brands commonly use DD and DDD/F labels after D.
| US Cup Size | Bust minus Band | Common Labeling Note |
|---|---|---|
| AA | Less than 1 in | Very shallow cup volume |
| A | 1 in | Small cup volume |
| B | 2 in | Moderate cup volume |
| C | 3 in | Fuller cup volume |
| D | 4 in | Full cup volume |
| DD/E | 5 in | Often labeled DD |
| DDD/F | 6 in | Often labeled DDD or F |
| G | 7 in | Labeling varies by brand |
Start with your underbust measurement for band size, then compare the difference between bust and band to estimate cup volume. A US bra size combines both parts, such as 34C or 36DD.
US cup progression is not perfectly standardized after D. Some brands use DDD while others use F for a similar volume, so measurement ranges and brand size guides are more reliable than the letter alone.
No. A US bra size chart gives a helpful starting point, but brands can vary in cup depth, wire width, and labeling after DD.
The band size is based on the ribcage measurement under the bust, while cup size is based on the difference between bust and band measurements.
Yes. US bra sizing is usually explained in inches, especially for band and bust measurement ranges.
