406.4 millimeters
16inches equates to 406.4mm
10inches, 12inches, and 16inches
1.34 feet
25% increase.
16 inches is 406.4mm
The area is 201.06 square inches.
8 inches. Radius is ½ diameter.
16 X pi = about 50 inches.
21 inchs like my dick
4 x 4
28 square feet.
The surface area would be 1536in2