Standard size chart

Size No. INNER DIAMETER LAY FLAT LENGTH CUT WIDTH THICKNESS
6 11 18 1.1 1.1
8 16 25 1.1 1.1
10 22 35 1.1 1.1
12 25 40 1.1 1.1
14 32 50 1.1 1.1
16 38 60 1.1 1.1
18 45 70 1.1 1.1
20 51 80 12 1.1
25 64 100 15 1.1
30 76 120 18 1.1
35 89 140 21 1.1
40 102 160 21 1.1
45 114 180 21 1.1
50 127 200 21 1.1