I don't see that Union makes this binding...
I don't see that Union makes this binding in a S/M. Does that mean the M/L binding would fit a smaller 7.5 boot?
I guess that union doesn't make them in such small size. But i wouldn't recomend you to buy M\L as they will be too big for you. I had the same problem with mine, my size is 10.5 so i got L\XL and now i have to strap my boots all the way to the last hack.