I wear a D-cup, which doesn't appear in the sizing options

I wear a D-cup, which doesn't appear in the sizing options. I ordered the XL size of the bra I thought would give me the best support and received the order before the advised delivery date. The bra is a little snug and some overflow. However the support is tremendous. As I have started a healthy eating and exercise plan, I will be losing some weight and the fit will be perfect.