Canadian here, we use the US sizes and describe them in inches (or by name, so we say "letter" or "8.5 by 11"). Microsoft Office uses both inches and millimetre

Canadian here, we use the US sizes and describe them in inches (or by name, so we say "letter" or "8.5 by 11"). Microsoft Office uses both inches and millimetres but I always thought they did that for outside of Canada too.