Compare your breast size to your body frame and overall proportions
Check your bra size, especially the cup size and band size
Notice whether your breasts are larger than average for your age and body type
Look at how much your breasts fill out shirts, bras, and dresses
See whether you need larger bra cups or wider bands than most people you know
Measure your bust and underbust to estimate your bra size
Compare both breasts to common clothing size charts
Ask a professional bra fitter for an accurate measurement
Compare your measurements with average breast size ranges
Consider whether your breasts feel noticeably larger than what you usually see around you