Bra Size Chart and Fit Guide
Understand your band size, cup size, sister sizes, and common bra fit problems in a simple, body-positive way.
Made for comfort-first, confidence-first bra fitting.
Size Guide Preview
Learn the parts of a better fit.
Bra size usually has two parts: a number and a letter. The number shows band size. The letter shows cup size. A good fit also depends on breast shape, band comfort, cup smoothness, and strap support.
Bra Size Chart Basics
These are the main terms you need before reading any bra size chart.
What Is Band Size?
Band size should feel secure around your body, not loose, painful, or uneven.
What Is Cup Size?
Cup size is not fixed by the letter alone. Band size changes cup volume.
What Is a Sister Size?
A sister size has similar cup volume with a different band size. It can help when your usual size feels close but not right.
Common Bra Size Examples
Simple examples for common sizes women often search for and compare.
How Do You Know If Your Bra Fits?
If something feels off, start with the fit sign you notice most.
Latest Size Guides
Helpful guides on bra size charts, cup sizes, sister sizes, fit problems, and comfortable support.
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Need a Starting Size?
Use the FitMyBra calculator to estimate your band size, cup size, and sister size.
Bra Size Questions
Short answers for common bra size and fit questions.
Start with Your Size. Then Check Your Fit.
FitMyBra helps you understand sizing, cup fit, sister sizes, and everyday comfort.