Brass with Iron with Plastic Ear Nuts, Friction Earring Backs for Stud Earrings Set, Mixed ColorSize about: Brass Bullet Clutch Bullet Clutch Earring Backs with Pad: 11x11x7mm, hole: 1mm, 2 colors, 6pair/colors, 12pair; Iron Ear Nuts: 6x5mm, hole: 1mm, 2 colors, 40pcs/color, 80pcs; Plastic Ear Nuts: 3x3mm, hole: 0.5mm, 2 colors, 100pcs/color, 200pcs; Brass Ear Nuts: 5x5x3mm, hole: 1mm, 2 colors, 40pcs/color, 80pcs.