1/8 - 3.175mm 3/16 (4.763mm) 1/4-6.35mm 5/16 -7.938mm 7/16-11.113mm 3/8-9.525mm 1/2-12.700mm 5/8-15.875mm 3/4-19.050mm 7/8-22.225mm 1''-25.4mm 1"1/8 -28.575mm 1"1/4-31.750mm 1"3/8-34.925mm 1"1/2-38.10mm 1"3/4-44.450mm 2"-50.800mm 2"1/4-57.150mm 2"1/2-63.500mm 2"3/4-69.850mm 3"-76.200mm 3"1/2-88.900mm 4"-101.800mm 4"1/2-114.300mm 5"- 127mm 5"1/2-139.700mm 6" - 152.400mm 7"-177.800mm