Canon BJ-20 User Manual page 40

where:
HORIZONTAL
In mm
a. 182-216
A4 3.4
b.
Letter 6.4
The paper should be smooth and flat, without any curls, folds, or
damaged edges.
VERTICAL
In inch
7.2-8.5
0.13
0.25
In mm In Inch
c 182-356 72.-14.0
d 12.7 0.5
e 12.7 0.5