Canon PIXMA MX459 Online Manual page 59

Envelopes
Size
European DL
US Comm. Env. #10
Recommended printing area
(A) 0.31 inches (8.0 mm)
(B) 1.28 inches (32.5 mm)
(C) 0.22 inches (5.6 mm)
(D) 0.22 inches (5.6 mm)
Recommended Printing Area (width x height)
3.88 x 7.06 inches (98.8 x 179.5 mm)
3.68 x 7.90 inches (93.5 x 200.8 mm)