No longer than 5 inch veggies fit on sheeter, must be straight veggies and they should be very fat for any kind of a nice sheet.  The core that is left after the sheet is cut is approximately 1.25 inches in diameter and 5 inches in length - a big chunk of waste (maybe use in salad or stir fry). If your veggie isn’t very straight when you bought it then you won’t get long, nicely formed sheets.  They’ll come out in pieces or with gaps or cutouts in them. My best results came with a cucumber, but still too much waste for my liking.  All in all, good idea, lack luster results.