Disclaimer
Estimates Only
Everything on Bra Size Calculator — including the bra size calculator, the sister size calculator, and the size charts — provides estimates only. No result on this Site is a guarantee that a particular size will fit you.
Brand Sizing Differs
Bra sizing is not standardized. The same labeled size can fit differently between brands, and even between different styles from the same brand. Always check the manufacturer's own size chart before buying, and try garments on where possible.
Style Affects Fit
Fit depends on more than band and cup: strap design, cup shape, fabric, underwire style, and padding all change how a bra feels and looks. Two bras in the same labeled size can fit very differently.
Check Manufacturer Charts
Treat our results as a starting point. Before purchasing, compare your estimated size against the size chart of the specific brand and product you are considering.
Educational Purpose
This Site exists for general educational purposes — to explain how measuring works, how sizing systems relate, and how sister sizes work. It is not a substitute for a professional fitting.
Not Medical Advice
Nothing on this Site is medical advice, and nothing here should be used to diagnose or treat any condition. If you have health concerns related to fit or comfort, consult a qualified professional.
If anything on the Site seems wrong or unclear, please let us know through our contact form.