Step 2: Leather Bracelet Tutorial - Step 2
Then string a crimping bead on your doubled elastic. Add the beads and close with another crimping bead. Add a jump ring and go back thru the crimping bead. That might be a bit tight and difficult but it will work. Pull gently. Crimp the two beads on both ends making sure to not pull the elastic too much because you want to be able to easily stretch it over your hand. Cut the left over elastic.