13 x 18 cm / 5 x 7 in., 15 x 20 cm / 6 x 8 in., 20 x 25 cm / 8 x 10 in., 25 x 25 cm / 10 x 10 in., 27 x 35 cm / 11 x 14 in., 30 x 30 cm / 12 x 12 in., 30 x 40 cm / 12 x 16 in., 35 x 35 cm / 14 x 14 in., 40 x 40 cm / 16 x 16 in., 40 x 50 cm / 16 x 20 in., 45 x 45 cm / 18 x 18 in., 45 x 60 cm / 18 x 24 in., 50 x 50 cm / 20 x 20 in., 60 x 80 cm / 24 x 31 in., 70 x 70 cm / 28 x 28 in., 75 x 100 cm / 30 x 39 in.