PEPPERLONELY Brand, 100 Set Silver Tone No Sew Open Ring Snap Press Fastener Buttons 10mm Quantity: 100 Sets(400PCs Small Parts) Per pack Size: 11mmx4mm 11mm 10mmx4mm ( 3/8"x 1/8"x 1/8") Hole size: 7.5mm( 2/8") Thickness: 4mm( 1/8") Material: 	 Copper (Cadmium Safe)