Our Zen Sports Bra is best for the smaller cup sizes. You can fit a D cup in but you will have some spillage out the top. The fabric just isn't big enough to cover. We suggest going up one size for a D cup. 

Small 32  A/B/C 

Medium 34  A/B/C 

Large 36  A/B/C 

XL 38  A/B/C