Sizes: The bayonet necklace clasps long is about 25~25.5mm, wide is about 4.5~5mm ,hole is about 1.8~2mmthick is about 4 mm,2 colors, 2 colors, 2pcs/color, 4pcs;Please check the size before purchasing.Easy for you to link these bayonet necklace clasps with other findings.