Dell 3000cn Color Laser Printer - Manual (Page 66)

Capacity
The maximum stack height is 16 mm (0.6 in.). The multipurpose feeder can hold approximately:
150 sheets of 75 g/m 2 (20 lb) paper
Print Media Dimensions
The multipurpose feeder accepts print media within the following dimensions:
Width -- 90 mm to 215.9 mm (3.5 in. to 8.5 in.)
Length -- 139.7 mm to 355.6 mm (5.5 in. to 14 in.)
Loading the Multipurpose Feeder
In addition to plain paper, the multipurpose feeder can use various other sizes and types of print media such as envelopes,
and transparencies.
1. Gently pull open the multipurpose feeder cover.
2. Slide the width guides to the edge of the tray. The width guides should be fully extended.