Which size do I have?

20-21 13cm
22 14cm
23 15cm
24-25 16cm
25-26 17cm
27-28 18cm
29-30 19cm
30-31 20cm
32-33 21cm
33-34 22cm
35-36 23cm
37-38 24cm
38-39 25cm
40-41 26cm
41-42 27cm
43 28cm
44-45 29cm
46-47 30cm
48 31cm
49 32cm

You have to fit a clog yourself!
Put the clogs on with thick socks. You have the right size if your indexfinger fits between the clog and your heel. That way you can enjoy your clogs to the fullest.