Galvanized Square Wire Mesh Specification Wire Dia.(mm) Opening(mm) 3 mesh 1.60 6.87 4 mesh 1.20 5.15 5 mesh 0.95 4.13 6 mesh 0.80 3.43 8 mesh 0.70 2.43 10 mesh 0.60 1.94 12 mesh 0.55 1.56 14 mesh 0.41 1.40 16 mesh 0.35 1.24 18 mesh 0.30 1.11 20 mesh 0.27 1.00 22 mesh 0.25 0.90 24 mesh 0.23 0.83 26 mesh 0.20 0.78 28 mesh 0.18 0.73 30 mesh 0.15 0.70 35 mesh 0.14 0.59 40 mesh 0.14 0.50 50 mesh 0.12 0.39 60 mesh 0.12 0.30