3.1 x 3 cm 4.2 x 4 cm 5.2 x 5 cm 6.3 x 6 cm 7.3 x 7 cm 8.4 x 8 cm 9.4 x 9 cm 10.5 x 10 cm 12.6 x 12 cm 14.7 x 14 cm 15.7 x 15 cm 23.1 x 22 cm