How to Measure Bra Size at Home Without Guesswork
Build a reliable bra size starting point with a tape measure, a mirror, and a simple repeatable routine.
Interactive Tool
Calculate a starting bra size in seconds
Suggested Starting Size
32DD/EUse this as a starting point, then verify band level, gore position, and cup containment.
US
32DD/E
UK
32DD
EU
70E
FR
85E
JP
70E
Sister Sizes
30F
34D
Model Visualizer
See how bra size scale changes
This comparison illustration is educational and intentionally non-explicit. It helps users understand scale, not anatomy detail.
Fit Issue Helper
Translate common problems into next steps
Band riding up
Start by checking whether the band is too large or whether the cups are pushing the frame away from the body. A level band should anchor most of the support.
- Test the band backward.
- Check whether the bra is already on the tightest hook.
- Review sister sizes if the cup fit is otherwise close.
Keep Learning
Related guides for better fitting decisions
Sister Sizes Explained in Plain Language
Learn how cup volume shifts across band sizes so you can troubleshoot fit without starting over every time.
US, UK, EU, FR, and JP Bra Size Conversion
Use region-based bra conversion more confidently by separating band systems from cup naming differences.
7 Signs Your Bra Band Is Too Loose
A loose band steals support from the entire bra, even when the cup letter appears right.