Millimeter to Inch Chart

  2mm = 5/64"       16mm = 5/8"        4mm = 5/32"         18mm = 11/16"        6mm = 1/4"           20mm = 3/4"
  8mm = 5/16"       22mm = 7/8"        10mm = 3/8"         24mm = 15/16"      12mm = 1/2"           25.4mm = 1.0"

Gauges to Millimeters Chart

      20 ga         18 ga          16 ga          14 ga          12 ga         10ga

       0.813mm             1.024mm              1.290mm              1.629mm                2.052mm            2.588mm
                                      (1.0mm)               (1.2mm)               (1.6mm)                 (2.0mm)             (2.5mm)

         8 ga         6 ga             4 ga            2 ga            0 ga          00ga

       3.264mm             4.111mm              5.189mm             6.543mm                8.230mm            9.264mm
         (3.0mm)               (4.0mm)               (5.0mm)              (6.0mm)                 (8.0mm)             (10mm)

  *.i.e.: 18 ga = Worldwide Standard (1.024mm) = about usage (1.0mm)