Start by attaching a jump ring to one end of the clasp you've chosen. In my case, I made a hook out of wire one one end and hooked it onto a ring on the other end. To the jump ring you've just attached put one button on each side by pushing the ring through one of the button holes.
Next, put another ring in the center of the one you just made, and close it as best you can using the pliers. Repeat the precious step with this new ring making sure to have one button on each side.
Repeat these last two steps until the bracelet is long enough to fit around your wrist. To the end of the last jump ring, attach the other end of the clasp you've chosen.