S/M/L/XL
Breathable/Washable/Orderfree/Anti-bacteria
S:width of upper and lower = 12.5cm / length = 18cm
M:width of upper and lower = 13.5cm / length = 19.5cm
L:width of upper and lower = 14.5cm / length = 20.5cm
XL:width of upper and lower = 15cm / length = 22.5cm