... .open:1/4"*1/4"-2"*2" 4.wire diameter:12#-22# Galvanized & PVC Coated Welded Wire Mesh Wire Mesh serves as ... ,21,221/2" x 1/2"12.7mm x 12.7mm16,17,18,19,20,21,22,235/8" x 5/8"16mm ... ,18,19,20,211" x 1/2"25.4mm x 12.7mm16,17,18,19,20,211-1/2" x 1 ... inchIn metric unit(mm)1/2" x 1/2"12.7mm x 12.7mm16,17,18,19,20,213/4" x 3 ...