mm

3.25

3.5

3.75

4

4.5

5

5.5

6

6.5

8

9

10

12

15

approximate US size

3

4

5

6

7

8

9

10

10.5

11

13

15

17

19

12" (30cm)

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

16" (40cm)

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$22.50

$20.90

$22.00

$22.00

$27.50

20" (50cm)

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$22.50

$20.90

$22.00

$22.00

$27.50

24" (60cm)

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$22.50

$20.90

$22.00

$22.00

$27.50

$27.50

32" (80cm)

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$22.50

$20.90

$22.00

$22.00

$27.50

$27.50

40" (100cm)

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$22.50

$20.90

$22.00

$22.00

47" (120cm)

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$17.50

$22.50

$20.90

$22.00

$22.00

$27.50

$27.50

60" (150cm)