What types of paper does the M28-M31 support?
The printer supports standard paper sizes such as Letter (216 x 279 mm) and A4 (297 x 210 mm). It also accepts custom size paper from 76 x 127 to 216 x 356 mm. (Page 7)
From the official HP Laserjet Pro Mfp M28 M31 Printer manual, page 7
Have a follow-up question?
Answers from the official manual.
Common questions