Paw Plugs / Gauges. 4g / 5mm, 2g / 6mm, 0g / 8mm, 00g / 10mm, 1/2" / 12.5mm, 9/16" / 14mm, 5/8" / 16mm, 3/4" / 19mm, 7/8" / 22mm, 1" / 25mm