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Size Guide

ATTENTION: The sizes shown on our site are US

 

 

USA

ITALY

INTERNAL DIAMETER (mm)

CIRCUMFERENCE (mm)

4

7

14.9

47

5

9

15.6

49

6

11

16.2

51

7

14

17.2

54

8

17

18.1

57

9

20

19.1

60

10

22

19.7

62

11

25

20.6

65

12

27

21.3

67

 

How to measure the internal diameter?

 

If you are undecided between two sizes, we advise you to choose the larger size or ask our experts for support on the number

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