Bilipala Bronze Smooth Coat Buttons Copper Jeans Tack No-Sew Buttons , Set of 30 One package includes 10 smooth coat buttons, 10 solid tack buttons with stars and 10 hollow jeans buttons The bronze buttons are suitable for coats, jackets, backpacks, shoes, suits, trousers and etc All the metal buttons are made of cooper, will not rust. Diameter: smooth polished buttons: 20mm; tack buttons with stars:15mm; hollow jeans buttons: 17mm