Pack of 15 Sets Shinny Black Snap Fasteners Poppers Press Studs Sewing Leather Buttons For Leather Craft , Clothing , Jacket (15mm (201 Long Post)) Using for leather craft , clothing ,handbags, jacket etc. The Size measured the front part (cap diameter) : 12.5 mm, 15 mm,17 mm ; The 15mm with Standard post can go through 2.5mm thickness leather; The 15mm with longer post can go through 4mm thickness leather One pack 15 Completed Sets (1 set = cap+male+female+back) Color: Black Shinny ; Material : Brass (Non-rusting)