I agree with Alan, max length is 37.4 in, though. I have been printing landscape/panos with the 3880 using Canvas and paper media in B&W and color. I purchase roll media and cut to size with a Rotatrim Mastercut 24 incher. I tried other cutters but they just tore the canvas or folded it over with ragged edges. It is very important to maintain your 2 working straight edges: the bottom and the right side. Feeding the thicker media, 18-24 mils can be frustrating, whether paper or canvas. My workflow starts with feeding the media into printer position by using the down arrow (the southern position on the compass cross of 4 buttons) to 'prefeed'. I hold the media gently and help guide it, if it does not take the down arrow will eject it and you can try again. Once it 'takes' I then issue my print command and printing follows--again alignment is important. To avoid losing a large print due to misalignment I allow larger margins and use my Rotatrim cutter to reform the margins correctly.
Interesting psychological note, previously my other printer would allow a max print size of 13x24 which looked big. When I started printing my first 17x25 prints everything appeared 'humungous'--just loading the sheet into the printer and holding the finished print was awesome. I thought I had a wall mural in my hands! After several more prints and days, these prints shrunk 'visually' to my eyes and were just a larger '13x19'. My one 17x34, done for test purposes, was quite impressive physically and still is. Several larger prints, 24x36 done prior to my 3880, I had outsourced. Yes they were darn big--but having been printed and handled by me were not awesome visually. Artistically and quality wise they were superb.
good luck with your new toy!!! irv weiner