Size guides
Bra Sizes Explained
Pick a size to see what it means in inches, which sister sizes share its cup volume, and how it is labeled in UK, EU, French and Australian sizing.
Common bra sizes
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34B bra size What a 34B bra size means in inches and centimeters, its sister sizes (32C and 36A), how it converts abroad, and what to try if 34B doesn’t fit.
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32B bra size What a 32B bra size means in inches and centimeters, its sister sizes (30C and 34A), how it converts abroad, and how to tell if 32B fits.
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34C bra size What a 34C bra size means in inches and centimeters, whether 34C is big, its sister sizes (32D and 36B), and how it converts to UK and EU sizing.
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36C bra size What a 36C bra size means in inches and centimeters, whether 36C is the same as 34D, its sister sizes, and how 36C converts to UK, EU and French sizing.
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36B bra size What a 36B bra size means in inches and centimeters, its sister sizes (34C and 38A), why many 36B wearers measure smaller, and how 36B converts abroad.
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34D bra size What a 34D bra size means in inches, whether 34D is big, its sister sizes (32DD and 36C), how it converts to UK and EU sizes, and how a 34D should fit.
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32D bra size What a 32D bra size means in inches and centimeters, its sister sizes (30DD and 34C), why 32D is often sold as 36A, and how 32D converts abroad.
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34A bra size What a 34A bra size means in inches and centimeters, its sister sizes (32B and 36AA), how to stop A cups gaping, and how 34A converts to UK and EU sizes.
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36D bra size What a 36D bra size means in inches and centimeters, whether 36D is big, its sister sizes (34DD and 38C), how it converts abroad, and the styles that suit it.
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34DD bra size What a 34DD bra means in inches, its sister sizes (32DDD and 36D), how 34DD compares with 34DDD and UK 34E, and how to find 34DD bras that fit.
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Cup sizes
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A cup bra size What an A cup bra size means, how A cups compare across bands, A vs AA, how to stop A cups gaping, and the bra styles that fit small cups best.
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DD cup (double D) What a DD (double D) cup means in inches, how DD compares across bands, DD vs E vs DDD, and how to find DD bras that fit and support you.
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DDD cup (triple D) What a DDD (triple D) cup means in inches, why DDD equals a UK E cup, what size comes after DDD, and how to find triple D bras that fit.
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G cup bra size What a G cup means in inches, why a US G is a UK F and a UK G is a US I, G cup sizes across bands, sister sizes, and where to find G cup bras.
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H cup bra size What an H cup means in inches, why a US H is a UK FF and a UK H is a US K, H cup sizes across bands, sister sizes, and features to look for in H cup bras.
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K cup bra size What a K cup means in inches, why a US K is a UK H and a UK K is a US O, K cup sizes across bands, sister sizes, and where to find K cup bras.
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Size facts
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Biggest bra size The biggest bra sizes brands actually sell, in US and UK letters: how far cup and band ranges go, why a UK K is a US O, and how to shop at the top of the range.
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Smallest bra size The smallest bra sizes brands sell: AA cups, 28 bands and what to do if you measure smaller. How small sizes work, and which features help small busts.
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Average bra size Is the average US bra size really 34DD? Where that figure comes from, why there is no official average, and why your own measurements matter more.
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