Canon BJ-230 - Manual (Page 74)

Envelopes:
Horizontal
a 8.3 to 11.7 inches (210 to 297 mm)
b 0.13 inch (3.4 mm)
A4 and A3-size paper
0.25 inch (6.4 mm)
Letter-, legal-, ledger-size paper
Vertical
c 8.3 to 17 inches (210 to 431 mm)
d 0.5 inch (12.7 mm)
e 0.3 inch (8 mm)