Please according to picture chart for size to choose your size!
Size for your reference:

Size :Euro 35 ( US 5 ) ,Foot Length: 221-225mm/8.7-8.8in

Size :Euro 36 ( US 5.5 ), Foot Length:226-230mm/8.8-9.0in

Size :Euro 37 ( US 6 ), Foot Length :231-235mm/9.0-9.2in

Size :Euro 38 (US 6.5 ), Foot Length : 236-240mm/9.2-9.4in

Size :Euro 39 ( US 7 ),Foot Length : 241-245mm/9.4-9.6in

Size :Euro 40 ( US 7.5),Foot Length : 246-250mm/9.6-9.8in

Size :Euro 41 ( US 8),Foot Length : 251-255mm/9.8-10.0in

Size :Euro 42 ( US 8.5),Foot Length : 256-260mm/10.0-10.2in

Size :Euro 43( US 9),Foot Length : 261-265mm/10.2-10.4in

Size :Euro 44 ( US 9.5),Foot Length : 266-270mm/10.4-10.6in

How to Use :
For luminous pattern,In bright environment, luminous pattern begin to absorb light, it is white at this time, in the dark environment, luminous pattern can emit blue luminous, brightness in the dark environment depend on the time of absorbing and intensity of light.