My daughter loves her Crocs, but the buttons holding the strap on keep falling off. Here is how I fix them quickly. Remove any remaining part of the original button. Buy a jeans button at a fabric store. They usually come in packs and might be on display with snaps and other notions nearby. Try to find a button the same diameter and shank size as the Croc one. I used a Dungaree Button, 5/8", no-sew, by Dritz. You simply hold the button in place and push the back on(looks like a thumb tack). Good as new!