New ERA (inches to cm)


6 7/8 - 54.9

7 - 55.8

7 1/8 - 56.8

7 1/4 - 57.7

7 3/8 - 58.7

7 1/2 - 59.6

7 5/8 - 60.6 

7 3/4 - 61.5

7 7/8 - 62.5

8 - 63.5