... of Welded MeshOpening (mesh) SizeWire Diameter In inchIn metric unit (mm)1/4" x 1/4"6.35 x 6.35mm22,23,24,25 ... ,26,271/2" x 1/2"12.7 x ... .7mm16,17,18,19,20,21,22,23,243/4" x 3/4"19.1 x 19.1mm16,17,18,19,20,21 ... ,221" x 1"25.4 x 25.4mm16,17,18,19,20,21,221/2 ...