Canon BJC 3000 Reference Manual page 40

US Com. #10 Envelope
Printable Area (width
US Com. #10
7.0mm
height) Size (in.)
x
3.0mm
6.4mm 31.7mm
Recommended printing area
(The printable area is identical to each other.)
9.5" 4-1/8"
x
Printing on Paper and Other Media
Printing Area
40