Standard size. If your feet are wider, please choose the bigger one. EU size 35 US size 4.0 UK size 3.5 foot length 22.5. EU size 36 US size 4.5 UK size 4.0 foot length 23.0. EU size 37 US size 5.0 UK size 4.5 foot length 23.5. EU size 38 US size 6.0 UK size 5.5 foot length 24.0. EU size 39 US size 6.5 UK size 6.5 foot length 24.5. EU size 40 US size 7.0 UK size 7.0 foot length 25.0. EU size 41 US size 8.0 UK size 7.5 foot length 25.5. EU size 42 US size 8.5 UK size 8.0 foot length 26.0. EU size 43 US size 9.0 UK size 8.5 foot length 26.5. EU size 44 US size 10 UK size 9.5 foot length 27.0. Size 45=Foot length 27.5cm. Size 46=Foot length 28cm. Size 47=Foot length 28.5cm. Size 48=Foot length 29.0cm. Standard size If your feet are wider, please choose the bigger one EU size 35 US size 4.0 UK size 3.5 foot length 22.5 EU size 36 US size 4.5 UK size 4.0 foot length 23.0 EU size 37 US size 5.0 UK size 4.5 foot length 23.5 EU size 38 US size 6.0 UK size 5.5 foot length 24.0 EU size 39 US size 6.5 UK size 6.5 foot length 24.5 EU size 40 US size 7.0 UK size 7.0 foot length 25.0 EU size 41 US size 8.0 UK size 7.5 foot length 25.5 EU size 42 US size 8.5 UK size 8.0 foot length 26.0 EU size 43 US size 9.0 UK size 8.5 foot length 26.5 EU size 44 US size 10 UK size 9.5 foot length 27.0 Size 45=Foot length 27.5cm Size 46=Foot length 28cm Size 47=Foot length 28.5cm Size 48=Foot length 29.0cm