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Bra Size Calculator UK
Find your perfect UK bra size easily using band and bust measurements. Quick, simple, and accurate sizing for the UK.
Bra Size Calculator
Stand in front of a mirror wearing a non-padded bra. Take a soft measuring tape and wrap it around your body.
Step 1: Your Band Size
Measure snugly around your ribcage, directly under your bust. Keep the tape level.
Step 2: Your Bust Size
Measure around the fullest part of your bust while keeping the tape level and not too tight.
Units
Step 3: Calculate Size
Click below to calculate your correct UK bra size instantly.
Top UK Bra Brands
Shop comfortable and high-quality bras from popular UK lingerie brands.
- Marks & Spencer (M&S)
- Ann Summers
- Bravissimo
- Boux Avenue
- Victoria’s Secret UK
3 Steps to Measure Your Bra Size at Home
Step 1: Measure Your Band Size
To find your band size, stand in front of a mirror and wrap a soft tape measure around your ribcage, just under your bust. Ensure it’s snug but not tight. Round to the nearest whole number. If the number is even, use it as is; if odd, add 1 inch. This gives you the base of your bra size.
Step 2: Measure Your Bust Size
Next, measure around the fullest part of your bust. Keep the tape parallel to the floor and breathe normally. Avoid pressing too tightly. This ensures the measurement reflects your natural shape and fits your cup correctly.
Step 3: Calculate Your Cup Size
Subtract your band size from your bust measurement. The difference in inches determines your cup: 1 inch = A cup 2 inches = B cup 3 inches = C cup 4 inches = D cup This method works for all body types, including full-busted and petite frames, making it perfect for a home bra sizing routine.
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Frequently Asked Questions
How do I calculate my bra size at home?
Measure your band size (snugly around under bust, round to nearest even number) and your bust size (loosely around fullest part). Subtract band from bust — that difference tells you your cup size. 1 inch = A, 2 = B, 3 = C, 4 = D, and so on.
How does bra sizing differ between US and UK?
Measure your band size (snugly around under bust, round to nearest even number) and your bust size (loosely around fullest part). Subtract band from bust — that difference tells you your cup size. 1 inch = A, 2 = B, 3 = C, 4 = D, and so on.
How do I convert my US bra size to European (EU) sizing?
Measure your band size (snugly around under bust, round to nearest even number) and your bust size (loosely around fullest part). Subtract band from bust — that difference tells you your cup size. 1 inch = A, 2 = B, 3 = C, 4 = D, and so on.
What is a sister size in bras?
Measure your band size (snugly around under bust, round to nearest even number) and your bust size (loosely around fullest part). Subtract band from bust — that difference tells you your cup size. 1 inch = A, 2 = B, 3 = C, 4 = D, and so on.
Why do bra sizes vary between brands?
Measure your band size (snugly around under bust, round to nearest even number) and your bust size (loosely around fullest part). Subtract band from bust — that difference tells you your cup size. 1 inch = A, 2 = B, 3 = C, 4 = D, and so on.