50 Black, 5/8 Plastic (16mm), NON-ADJUSTING, Contoured Side-Release Buckles. Great for Paracord Bracelets! 5/8" (16mm) openings for straps or webbing contoured side-release 1 5/8" (41 mm) wide at the widest point, and 7/8 inch (23mm) long NON-ADJUSTING (only one slot for webbing on each buckle half)