Size 30: inner length approximately 18.9 cm
Size 31, inner length is about 19.6cm
Size 40, inner length is about 25.5cm
Size 29, inner length is about 18.3cm
Size 34, inner length is about 21.5cm
Size 35, inner length is about 22.2cm
Size 32, inner length is about 20.2cm
Size 33, inner length is about 20.9cm
Size 38, inner length is about 24.2cm
Size 39, inner length is about 24.9cm
Size 36, inner length is about 22.9cm
Size 37, inner length is about 23.5cm
