1 1/2" (38mm) Square Nickel Free Snap On Plain Non-Leather Jean Belt Material: Synthetic leather - animal free material 1 1/2" wide belt strap fits most jeans. Snap on buckle, interchangeable buckle Nickel free square silver tone buckle, made of zinc alloy Sizing: Measure around where you wear the belt, with your pants on, and find that number in the size range.