6 gauge ~ 4mm > 4 gauge ~ 5mm > 0 gauge ~ 8mm > 00 gauge ~ 9.5mm > 1/2 inch ~ 12.5mm > 1-1/8 inch ~ 28.5mm > 1-1/2 inch ~ 38mm > 1-3/4 inch ~ 44.5mm > 1-7/8 inch ~ 48mm > Silicone