Retainers & Hiders > Single Flare > 10 gauge ~ 2.5mm > 8 gauge - 3mm > 2 gauge ~ 6mm > 1 gauge ~ 7mm > 0 gauge ~ 8mm > 1/2 inch ~ 12.5mm > 11/16 inch ~ 18mm > 7/8 inch ~ 22mm > 1-3/8 inch ~ 35mm