21 inner length 13cm

22 inner length 13.5cm

23 inner length 14cm

24 inner length 14.5cm

25 inner length 15cm

26 inner length 16cm

27 inner length 16.5cm

28 inner length 17cm

29 inner length 17.8cm

30cm inner length 18.5cm

31 inner length 19cm

32 inner length 19.6cm

33 inner length 20.2cm

34 inner length 21cm

35 inner length 21.5cm

36 inner length 22.2cm

(21-25) 5 pairs in one hand

(26-30) 5 pairs in one hand

(31-36) 6 pairs in one hand