... . Specification List of Welded Wire Mesh:OpeningWire DiameterIn inchIn metric unit(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 ... Mesh:OpeningWire DiameterIn inchIn metric unit(mm)1/2" x 1/2"12.7mm x 12.7mm16,17,18,19,20,213/4" x 3/4 ...