Wearing the right bra size is not just about comfort—it also supports your posture and boosts confidence. Many women wear the wrong size simply because they don’t know how to measure correctly. In this guide, you’ll learn an easy, step-by-step method to measure your bra size at home using just a measuring tape.
Wrap a soft measuring tape snugly around your ribcage, directly under your bust. Make sure the tape is level and not too tight. Round the number to the nearest whole number.
Example: If your underbust measures 31 inches, add 5 → Your band size = 36.
Stand straight and wrap the tape loosely around the fullest part of your bust. Make sure it is parallel to the ground. Round up to the nearest inch.
Example: If your bust measures 39 inches, write it down.
Subtract your band measurement from your bust measurement:
Bust – Band = Cup Size
Example: Bust (39) – Band (36) = 3 → Cup size C.
Your bra size is 36C.
Here’s a quick chart to help you match the difference with your cup size:
| Difference (inches) | Cup Size |
|---|---|
| 1 | A |
| 2 | B |
| 3 | C |
| 4 | D |
| 5 | DD/E |
To save time, you can simply enter your measurements into our Bra Size Calculator and get your size instantly.
Yes, you can use a string and then measure it with a ruler for approximate results.
It’s recommended every 6–12 months or whenever you notice changes in weight, body shape, or comfort.
Different brands and styles fit differently. You may need to try multiple options to find your best fit.
Measuring your bra size at home is simple and ensures you always wear the right fit. Use this guide to check your size and confirm it with our online calculator. A well-fitted bra is the first step to comfort, confidence, and better posture.