Size 26 inner length 16cm

Size 27, inner length 16.6cm

Size 28, inner length 17.2cm

Size 29, inner length 17.8cm

Size 30, inner length 18.4cm

Size 31, inner length 19cm

Size 32, inner length 19.6cm

Size 33, inner length 20.4cm

Size 34, inner length 21cm

Size 35, inner length 21.6cm

Size 36, inner length 22.2cm

Size 37, inner length 22.7cm