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Defined by the CAN 2-9.60M Canadian paper size standard, canadian paper sizes are no longer widely used and can now be considered obsolete. Their cause has not been helped by the fact that the paper size does not have a single aspect ratio.

The canadian paper sizes are also sometimes referred to as PA1, PA2, etc

Format Width x Height (mm) Width x Height (inches)
P1 560 x 860 mm 22 x 33.9 inches
P2 430 x 560 mm 16.9 x 22 inches
P3 280 x 430 mm 11 x 16.9 inches
P4 215 x 280 mm 8.5 x 11 inches
P5 140 x 215 mm 5.5 x 8.5 inches
P6 107 x 140 mm 4.2 x 5.5 inches