Product information: 

Upper material: mesh
Function: Breathable, non-slip
Pattern: plain
Thickness: Normal thick
Wearing style: Velcro
Color: white, red, blue, black

Size Information: 

Size: Inner length 14cm (18 size),inner length 14.5cm (19 size),inner length 15cm (20 size),inner length 15.5cm (21 size),inner length 16cm (22 size),inner length 16.5cm (23 code)