36

45.7

46

European 46 a touch roomier than a 36

30.7 inches

38

48.2

48

European 48 just a touch tighter than US 38

32.3 inches

40

50.8

50

European 50 is about ½ size tighter than a US 40, more of a 39.

33.8 inches

41

52

52

European 52 is the same as US 41

35.4 inches

42

53.3

54

European 54 is about ½ size larger than US 42, closer to a 43

37 inches

44

55.9

56

European 56 is essentially the same as US 44

38.6 inches

46

58.4

58

European 58 is about ¼ size tighter than US 46

40.2 inches

48

60.9

60

European 60 is about ½ size smaller than US 48, closer to a US 47

41.7 inches