Size Chart
36 M EU = 5.5/6 M US Women=9.10''foot=3.23''width
37 M EU = 6.5 B M US Women=9.37''foot=3.31''width
38 M EU = 7 M US Women=9.60''foot=3.39''width
39 M EU = 8 M US Women=9.88''foot=3.46''width
40 M EU = 8.5/9 M US Women t=10.16''foot=3.58''width
41 M EU = 9.5 M US Women=10.39''foot=3.66''width
42 M EU = 10 M US Women=10.67''foot=3.74''width

If you choose wide width usually, it is recommended that you to choose the bigger one size