This is a standard leather bracelet template. Included are three files for different wrist sizes. They are in SVG format for easy adaptation to a laser cutter.Holes for snaps are for standard "Glove" sized snaps. I got mine at Tandy Leather for about $4 for a set that will do 10 bracelets. Snaps are set up so that the side closest to you when you wear the bracelet will be flat on your wrist. The other side will be slightly raised as it snaps into the snap sitting on your wrist. If you prefer, you can change this by flipping the template horizontally.You will need: Thin(ish) leather. (I think the stuff I have is about 1/8" or less."Glove" sized leather snaps. (I got mine at Tandy Leather)Snap set tools and anvil. (Again, Tandy Leather)A laser cutter. (Leather doesn't require anything super powerful, you tend to want to do a lot of passes at low power anyways to prevent bad charring)Some painter's tape (If you cover the leather before cutting/rastering it can help a lot with smoke darkening the face of the leather)The smallest size is good for small female adult wrists, while the biggest size fits most large male adult wrists. Most people will probably want the middle one, and for kids you'll have to measure and adjust.