Please measure your heel to toe length and choose accurate size according to the foot measurements.
34 EU -- 22cm (Foot Length) -- 3.5 US Men -- 4.5 US Women
35 EU -- 22.5cm (Foot Length) -- 4 US Men -- 5 US Women
36 EU -- 23cm (Foot Length) -- 4.5 US Men -- 6US Women 
37 EU -- 23.5cm (Foot Length) -- 5.5 US Men -- 6.5 US Women
38 EU -- 24cm (Foot Length) -- 6 US Men -- 7.5 US Women
39 EU -- 24.5cm (Foot Length) -- 7 US Men -- 8.5 US Women
40 EU -- 25cm (Foot Length) -- 7.5 US Men -- 9 US Women
41 EU -- 25.5cm (Foot Length) -- 8.5 US Men -- 9.5 US Women 
42 EU -- 26cm (Foot Length) -- 9 US Men -- 10 US Women
43 EU -- 26.5cm (Foot Length) -- 10 US Men -- 10.5 US Women
44 EU -- 27cm (Foot Length) -- 10.5US Men -- 11US Women 
45 EU -- 27.5cm (Foot Length) -- 11 US Men -- 12 US Women 
46 EU -- 28cm (Foot Length) -- 12 US Men -- 13 US Women