Fit varies by brand
Bra sizing systems differ by country, brand, style and personal fit preference. Use this as a starting size, not a final fitting guarantee.
Example
If underbust is 32 inches and bust is 37 inches, the 5-inch difference gives a starting cup estimate around DD/E in many US-style size charts.
How to use the result
Use the estimate to choose a few nearby sizes to try. Band fit, cup shape, strap placement and fabric stretch can all change what feels right.
Common mistakes
Do not assume one brand's size will fit the same in every style. Measure with the tape level and snug, but not tight enough to compress the body.
Limitations
This is a clothing fit estimate, not a health or body assessment. Country sizing systems and brand conversions can differ.
Last reviewed: 2026-05-17