Size 26 has an insole length of 16cm

Size 27 has an insole length of 16.7 cm

Size 28 has an insole length of 17.3 cm

Size 29 has an insole length of 18cm

18.7cm inside size 30

Size 31 has an insole length of 19.3 cm

Size 32 has an insole length of 19.8 cm

Size 33 has an insole length of 20.4 cm

Size 34 has an insole length of 21cm

Size 35 has an insole length of 21.5 cm

Size 36 has an insole length of 22.1 cm