Gr. 19 = 12,5 cm                  Gr. 30 = 19,5 cmGr. 20 = 13,0 cm                  Gr. 31 = 20,0 cmGr. 21 = 14,0 cm                  Gr. 32 = 21,0 cmGr. 22 = 14,5 cm                  Gr. 33 = 21,5 cmGr. 23 = 15,0 cm                  Gr. 34 = 22,0 cmGr. 24 = 15,5 cm                  Gr. 35 = 23,0 cmGr. 25 = 16,5 cm                  Gr. 36 = 24,0 cmGr. 26 = 17,0 cm                  Gr. 37 = 24,5 cmGr. 27 = 17,6 cm                  Gr. 38 = 25,0 cmGr. 28 = 18,4 cm                  Gr. 39 = 26,0 cmGr. 29 = 19,0 cm                  Gr. 40 = 26,5 cm