Round Liner Sizing Chart
(approx sq. in. per diameter)π≈ 3.14159
4"
 12.57in²
5"
 19.63in²
5.5"
 23.76in²
6"
 28.27in²
7"
 38.48in²
8"
 50.27in²
9"
 63.62in²
10"
 78.54in²
11"
 95.03in²
12"
 113.10in²
14"
 153.94in²