To be used with a 1/2” wide strap!These snap hooks are just gorgeous! They have a very professional and high-end finish. They are excellent quality and perfect for removable straps on any cute clutch, wristlet or wallet. Or… make a key clip inside your bag so you never have to dig for them again! Use with a fabric loop or a small D-Ring. Inside measurements: 1/2″ (12 mm) wide x 1-1/2″ (37 mm) longAvailable in packs of 2