After you print this out, you'll need to get an Edge Beveling, Tokonole, and a Button Screw.

Use an edge beveler and Tokonole to burnish the edges to remove the fuzzy-ness from the leather bracelet. 

This is the last part, and depending on the size of the button snap that you have, you may need to make this hole larger / smaller. This can be done with the tip of a pen, an awl, or a hole puncher.