I have a size L/XL Union Force in Black, brand new. I ordered for my NS board, but they turned out to be to big for my size 9 boot. I can get pictures up tonight if your interested. They are great bindings, I am using a med/lrg now in white and love them.
Well, the forces generally are bigger then most bindings. The Lg/Xl fit a size 9 but I wanted the med/lrg because of the weight/size difference. That being said, I am maxed out in them with a size 9 and my boot is a little to wide for them. I am using 32's for boots. They will fit a size 10, with the straps adjusted down a bit. If I were a size 10 i would of used the lg/xl, so I think you will be ok with them.