Retainers & Hiders > Plugs > 12 gauge ~ 2.0mm > 10 gauge ~ 2.5mm > 6 gauge ~ 4mm > 2 gauge ~ 6mm > 1 gauge ~ 7mm > 0 gauge ~ 8mm > 00 gauge ~ 9.5mm > 9/16 inch ~ 14mm > 1-1/8 inch ~ 28.5mm