I'm a 12 and got the size 47. They seem to be quite wide-fitting. Given you're standing still with them on, the length shouldn't be an issue. I've no fault for them. They come with various inserts and there are lace stops so you can keep it loose down low, but tighten up further up your foot. Mega adjustable. Overall, can't fault them. The soles are very rigid, so don't put them on too far from the firing point .
One thing I have learned is that they aren't the solution to your shooting short-comings. You'll still need consistency and a good technique. I still think they're worth it as they close off one more of those things on your to-do list