12 x 12.5 inch (30 x 32 cms)16 x 16.7 inch (41 x 42 cms)20 x 20.8 inch (51 x 53 cms)24 x 25 inch (61 x 64 cms)28 x 29.2 inch (71 x 74 cms)32 x 33.3 inch (81 x 85 cms)36 x 37.5 inch (91 x 95 cms)42 x 43.8 inch (107 x 111 cms)48 x 50 inch (122 x 127 cms)