BraSizeMatch: a starting point for a better fit
Bra sizing can be confusing when measurements, sizing systems and brands differ. BraSizeMatch brings measurement-based estimates, sister sizes and size conversions together in a free browser tool.
FREE · Open BraSizeMatch
What you can do
Choose a quick two-measurement approach or an advanced six-measurement guide. Use inches or centimetres, and follow the guide for the selected method rather than mixing measurements from different systems.
Explore sister sizes and compare US, UK and EU size labels. These features help you understand alternatives before choosing a bra to try; they do not make all brands fit the same.
A practical way to use the result
For example, if you normally shop using a US size but are considering a UK retailer, first obtain a measurement-based starting size, then check the size-system conversion. Read that retailer's own fit and return guidance before ordering.
If a band feels too tight or loose, sister sizes can explain nearby alternatives with a similar cup volume. Do not treat a different cup letter alone as a complete size comparison.
What the calculator cannot guarantee
A calculated size is a starting fit estimate, not a guaranteed size or medical advice. Bra shape, fabric, construction and personal comfort can all affect the result when you try a garment on.
The tool is free to use. Open BraSizeMatch to check its current measuring instructions, available brand guidance and privacy information; this page is an introduction, not the calculator itself.
