What's the difference between a 9-inch and a 13-inch laminator?

A 9-inch (letter) laminator handles standard documents, photos, and recipe cards up to about 8.5 inches wide, which covers most home and classroom needs. A 13-inch (tabloid/A3) laminator accepts wider sheets like posters, anchor charts, and 11x17 documents. Verified-purchase reviewers note that 13-inch machines cost more and take up more desk space, so size to your largest typical job.