... metric unit(mm) 1/4" x 1/4" 6.4mm x 6.4mm 22,23,24 3/8" x 3/8 ... 2" 25.4mm x 50.8mm 14,15,16 2" x 2" 50.8mm x 50.8mm 12,13,14,15,16 Technical ... In metric unit(mm) 1/4" x 1/4"6.4 x 6.422,23,243/8" x 3/8"10 ... .6 x 10.619,20,21,221/2" x 1/ ... .716,17,18,19,20,212"x3"50 x 752.0mm,2.5mm,1.65mm3"x3"75 x 7562.67mm,2.41mm ... ,2.11mm,1.83mm,1.65mm2"x4"50 x 1002.11mm ...