D12 is your Universal Cup Size (UCS)
Did you know your UK K cup size is called an O cup size in other Brands? At HerRoom, it's easy to find both your K and O cup sizes in a single search. Simply search 40D12 and see everything that comes in your bra size.
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Find your best bra size
Fast
No measuring tape needed
Let's take a journey through the next few pages together. Get to the end, and I promise you'll have a better fitting bra size.
HerRoom CEO/Founder
Find your best
Bra Styles
By Tomima
You know your bra size. But, do you know your breasts? Sounds like a funny question, but certain bras styles and features work better for some breasts and not for others.
Answer the following questions, and I promise your new bras will make you look younger and thinner!
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