I really like this broad and actually own 3 of them. they are sized according to your traditional bra size, but I buy 1 size smaller so that I have the extra support. I really like that they are race back, as they are the only bras I can wear under all of my running clothes.
Because they look so much like a regular bra, I actually dye mine different colors with some laundry dye they sell at the grocery store. This keeps them from looking dingy after several sweaty workoutA.D.