Gauge Conversion (Korean/Japanese to Chinese) Korean / Japanese GaugeChinese GaugeDiameter #02#440.12 mm #01#420.14 mm #1#400.16 mm #2#380.18 mm #3#360.20 mm #4#340.22 mm #5#320.25 mm #8#300.30 mm #10#280.35 mm #12#260.40 mm Length Conversion (Millimeters to Inches) Length (mm)Length (Inches) 6.25 mm0.25″ 13 mm0.5″ 25 mm1″ 40 mm1.5″ 50 mm2″ 75 mm3″ 100 mm4″ 125 mm5″ 150 mm6″