Size Size chart 4"x6" 6"x4" 5"x7" 7"x5" 6"x6" 6"x8" 8"x6" A5 Portrait A5 Landscape 8"x8" 8"x10" 10"x8" 8.5"x11" 11"x8.5" 8"x12" 12"x8" A4 Portrait A4 Landscape 10"x10" 12"x12" 11"x14" 14"x11" 11"x17" 17"x11" 12"x16" 16"x12" A3 Portrait A3 Landscape 14"x14" 10"x20" 20"x10" 12"x18" 18"x12" 16"x16" 16"x20" 20"x16" 18"x18" 16"x24" 24"x16" A2 Portrait A2 Landscape 20"x20" 18"x24" 24"x18" 16"x32" 32"x16" 20"x28" 28"x20" 24"x24" 21"x28" 28"x21" 20"x30" 30"x20" 24"x32" 32"x24" A1 Portrait A1 Landscape 28"x28" 20"x40" 40"x20" 24"x36" 36"x24" 30"x30" 32"x32" 28"x40" 40"x28" 30"x40" 40"x30" 36"x36" A0 Portrait A0 Landscape 40"x40" 30"x60" 60"x30" 40"x48" 48"x40" 40"x60" 60"x40"