... 17,18,19,20,21 1" x 1/2" 25.4mm x 12.7mm 16,17,18,19,20 ... 2" x 1-1/2" 38mm x 38mm 14,15,16,17,18,19 1" x 2" 25.4mm x 50.8mm ... 14,15,16 2" x 2" 50.8mm x 50.8mm 12,13,14 ... ,15,16 Mesh in Inch Mesh in MM Wire Diameter in BWG 1/2" x ... 1/2" 12.7mm x 12.7mm 16,17,18,19,20 ... ,21 3/4" x 3/4" 19mm x 19mm 16,17,18,19,20,21 ...