Home Help Glossary 4 Share and earn What is a "ream" in printing? Corey Thompson Content Writer May 8, 2025 1 view Typically refers to a letterhead (8.5 inches by 11 inches size paper) comprised of 500 sheets. More from Glossary Our Papers and Finishes Explained We get it, our extensive line of papers and finishes can get kind of complicated. That's why we've l... What are "gutters" when referring to bound booklets or catalogs? Gutters are the inside margins closest to the spine or middle of the book. This also includes any ex... What are crossovers? A term referring to a two-page spread in which an image crosses over onto both pages of a booklet or... What are raster images? Raster images are those comprised of pixels and are either created in programs such as Photoshop or ... Back to Glossary View all Help topics