Size 23 has an insole length of 13.5 cm

14.0cm inside size 24

14.5cm inside size 25

Size 26 has an insole length of 15.0 cm

Size 27 has an insole length of 15.6 cm

16.2cm inside size 28

Inner length 16.8cm in size 29

17.4cm inside size 30

Size 31 has an insole length of 18.0 cm

18.6cm inside size 32

19.3cm inside size 33

Inner length 20.0cm in size 34