Sizes in cm

Inches                                     CM

10"x8"                                25cm x 20cm

12"x10"                              30cm x 25cm

12"x12"                              30cm x 30cm

16"x12"                              40cm x 30cm

20"x16"                              50cm x 40cm

20"x20"                              50cm x 50cm

30"x20"                              76cm x 50cm

24"x12"                              61cm x 30cm