Lexmark 2050 Color Jetprinter (260-2982) Envelope Types Faxback Doc. # 34662 You can load envelopes in the sheet feeder or manual feeder. For a list of envelope sizes you can load in the automatic feeder, see Paper Size. The acceptable dimensions for envelopes loaded in the manual feeder are: Length 127 to 364 mm 5.0 to 14.33 in. Width 76 to 228 mm 3.0 to 8.5 in. Weight 60 to 120 g/sqm 16 to 32 lb. Do not use the following types of envelopes: * Envelopes with windows, holes, perforations, cutouts, or deep embossing * Envelopes with a metal clasp, a string tie, or metal folding bars * Envelopes with peel-off sealing strips * Envelopes with contents enclosed (/BKL-10/30/96)