Size up in the band.
I'm a small band, large cup girl. I went up two band sizes from my standard US/UK band size, and then used my corresponding UK cup size. It is worth it to figure out which size of this bra will fit you best. This is the best fit and best support I've found - better than bras three times the price. I have already ordered more.
Oh, and none of the other Syrokan styles worked for me - if the same applies to you, try this one.
I tried this brand for this first time after what seemed liked hours searching for sports bras with hook and eye closure and padded cups. Well, this one is absolutely perfect. Based on other reviews, I decided to order one band size up so instead of my usual 38DD, I ordered a 40DD and it is perfect. Not too tight, certainly not loose, but the way a sports bra is supposed to feel. Everything is contained. The cups are molded/padded so there is no headlight issue. No side spillage. For the price, this bra is remarkable. I will definitely be ordering more.