Retainers & Hiders > Single Flare > 10 gauge ~ 2.5mm > 8 gauge - 3mm > 6 gauge ~ 4mm > 4 gauge ~ 5mm > 0 gauge ~ 8mm > 00 gauge ~ 9.5mm > 3/4 inch ~ 19mm > 1 inch ~ 25mm > 1-1/8 inch ~ 28.5mm