Information
The Zakka Clutch Clasp in Classic Silver measures 2 ¼" x 7" (5.5 x 18 cm) and is designed to be used with the Curvy Clutch pattern. It comes with paper string for the clasp installation method.
Here is a link to the original Zakka Workshop video on installing a purse clasp which provides some extra help in adding a clasp to a purse or clutch.