S size, bottom length (26.5cm) is suitable for  36-38 yards, cylinder circumference is about 36CM, shoe cover bottom length (26.5cm)

M size bottom length (28.5cm) is suitable for 39-40 yards, tube circumference is about 38CM shoe cover bottom length (28.5cm)

L size bottom length (30.5cm) is suitable for 41 yards - 42 yards, tube circumference is about 40CM shoe cover bottom length (30.5cm)

XL size bottom length (31.5cm) is suitable for 42-44 yards, cylinder circumference is about 42CM, shoe cover bottom length (31.5cm)

XXL size bottom length (32.5cm) is suitable for 45-46 yards, the circumference is about 44CM shoe cover bottom length (32.5cm)