Standard Bra Measurements
Shopping online, or just not sure where to start? Pull out the tape measure to check these basic measurements to get an approximation of your bra size. But remember, these measurements are only a guide every woman's body is uniquely hers and you will want to experiment by trying on bras in different sizes to find the combination that works for you. As you try on your bras, keep in mind that as band size decreases, so does cup size. So a 34D has a smaller cup size than a 38D. If you usually wear a 36C, you might also check your fit in a 34D or a 38B.Step 1: Determine Your Band Size
While still wearing your bra, measure around your rib cage just under the bottom edge of your bra. Make sure you hold the measuring tape in a comfortably snug position. This measurement represents the numbered part of your bra size.

Remove your bra. Wrap the measuring tape loosely around your back and around the fullest part of your bust. The difference between this measurement and your band size represents your approximate cup size.

Standard bra measurements will help you find a bra that's right for you.
Find your perfect bra fit - Dianes way.
