Pack of 15 Completed Sets Black Matte Metal Snap Fasteners Press Studs Poppers Clothing Bag Jacket Leather Craft Buttons (10mm) Using for leather craft , clothing ,handbags, jacket etc. The Size measured the front part : 10mm, 12.5mm, 15mm,17mm; For more details size, please check gallery pictures One pack 15 Completed Sets (1 set = cap+male+female+back) Color: Black Matte ; Material : Brass (Non-rusting) It can go through the max. 2.5 mm thickness leather/craft