Canadian Paper Sizes

Canada adopted the ISO paper sizes in 1972. However as the use of US paper sizes is common across North America, the Standards Council of Canada introduced metric versions of the US ANSI sizes in 1976 with the Paper Sizes For Correspondance CAN 2-9.60M Standard.

CAN 2-9.60M created the P series of paper sizes P1 to P6 that are the ANSI A,B,C and D paper sizes rounded to the nearest 5mm with the addition of two extra sizes smaller than ANSI A. It appears that these sizes are now obsolete.

Table of Canadian Standard Paper Sizes

SizeWidth x Height (mm)Width x Height (in)Aspect RatioANSI
P1560 x 860 mm22.0 x 33.9 in1:1.5357D
P2430 x 560 mm16.9 x 22.0 in1:1.3023C
P3280 x 430 mm11.0 x 16.9 in1:1.5357B
P4215 x 280 mm8.5 x 11.0 in1:1.3023A
P5140 x 210 mm5.5 x 8.3 in1:1.5-
P6105 x 140 mm4.1 x 5.5 in1:1.3333-

Unlike the ISO standard sizes which have the single aspect ratio of 1:root2, the Canadian P series sizes have a number of different aspect ratios, thus enlarging and reducing between the sizes is not as easy as with the ISO sizes. These sizes are also sometimes referred to as PA1, PA2 and so on.