S: cap length 21CM, length 40*22CM(Fit 70-80cm)
M: cap length 22CM, length 41*24CM(Fit 80-90cm)
L: cap length 23CM, length 43*26CM(Fit 90-100cm)
XL: cap length 24CM, length 44*28CM(Fit 100-110cm)
4XL: cap length 25CM, Length 50*32CM(Fit 130-140cm)