4 ½ in x 6 in (11.4 cm x 15.2 cm)
5 ½ in x 8 ½ in (14 cm x 21.6 cm)
6 ½ in x 11 ½ in (16.5 cm x 29.2 cm)
11 ½ in x 18 in (16.5 cm x 45.7 cm)