Finding the right bra size doesn’t have to be complicated. With just a soft measuring tape, you can determine your size at home in minutes. Here’s the updated step-by-step method most fit experts recommend today.
Step 1: Measure Your Band Size
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Stand straight and wrap the tape snugly around your ribcage, directly under your bust.
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Make sure the tape is level and not too tight.
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Round to the nearest whole number.
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Example: 31.5 inches → band size 32
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Example: 35.8 inches → band size 36
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👉 Unlike older methods, you don’t need to add 4–5 inches. Your ribcage measurement is your band size.
Step 2: Measure Your Bust Size
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Wrap the tape around the fullest part of your bust.
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Keep it level and comfortably snug.
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Round to the nearest whole number.
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Example: 37 inches
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Step 3: Calculate Your Cup Size
Subtract your band size (Step 1) from your bust size (Step 2):
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Difference of 1 inch → A cup
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Difference of 2 inches → B cup
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Difference of 3 inches → C cup
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Difference of 4 inches → D cup
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Difference of 5 inches → DD/E cup
Example:
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Band size: 32
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Bust size: 35
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35 – 32 = 3 → Cup size C
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Final bra size = 32C
Step 4: Double-Check the Fit
Your perfect bra should:
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Sit flat in the center of your chest.
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Have straps that stay in place without digging in.
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Feel snug on the band (most of the support comes from here).
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Allow you to breathe and move comfortably.
Extra Tips
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Measure while wearing a non-padded bra for accuracy.
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Sizes can vary slightly across brands and styles.
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Recheck your measurements every 6–12 months or after weight/shape changes.
✨ With this method, you’ll get a much more accurate bra size that reflects your real body—no confusing math required.
