This size #22 button shell has a diameter of 9/16" before covering and is boxed with 144 shells and 144 style 44 wire eye backs. This has a "U" shape smaller loop specially designed to prevent fabric damage and pull through in delicate material. You need a steel button cutter, covering die (Item #BMPD22), and button covering machine (Item#BMPM) to assemble this button for a professional look. This item is sold in a 1 gross box (also available in 5 gross box.)