What paper sizes does the HP LaserJet Pro MFP M127fn support?

The M127fn supports a wide range of paper sizes including Letter (216 x 279 mm), Legal (216 x 356 mm), A4 (210 x 297 mm), A5, A6, B5, Executive, various envelope sizes, and custom sizes ranging from 76 x 127 mm to 216 x 356 mm. Envelopes supported include #10, Monarch, B5, C5, and DL formats. To obtain the best results, select the correct paper size in the print driver before printing. (Page 22)