Inner circumference = 14*pi mm
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i believe you mean US sizes Diam = 20.7 mm Circum = 64.1 mm
Using the formula C=Pi x D Therefor the diameter of a shot putt ring is 12 feet and Pi = 3.14 So 3.14 x 12 = 37.68 feet
What kind of ring stops your circulation? A wedding ring!
19.5 ring size is
If the ring is 2 cm in diameter, the US ring size is 10 and a quarter. In terms of British and Australian size, it is said to be U.