... (mm)1/4" x 1/4"6.4mm x 6.4mm22,23,243/8" x 3/8"10.6mm x 10.6mm19,20,21,221/2" x 1/2"12.7mm x 12 ... .7mm16,17,18,19,20,21,22,235/8" x 5/8"16mm x 16mm18,19,20,21,3/4" x ... 3/4"19.1mm x 19.1mm16,17,18,19,20,211" x 1/2"25.4mm x 12.7mm16,17,18,19,20,211-1/2" x 1-1/2"38mm x ... 38mm14,15,16,17,18,191" x 2"25.4mm x 50 ...