13.9 x 12 inch (35 x 30 cms)18.5 x 16 inch (47 x 41 cms)23.2 x 20 inch (59 x 51 cms)27.8 x 24 inch (71 x 61 cms)32.4 x 28 inch (82 x 71 cms)37.1 x 32 inch (94 x 81 cms)41.7 x 36 inch (106 x 91 cms)48.7 x 42 inch (124 x 107 cms)55.6 x 48 inch (141 x 122 cms)