6 sheets of 8-1/2 x 11" Special Photo Paper that works well with our resin. Some printers are more finicky than others with paper feeding. Some just don't like thick papers. If your printer feeds paper through in a U-shape (vs. flat or a top-feed L-shape), you'll want to use this photo paper. It is still waterproof and makes a strong bond with your inkjet inks, but is a thinner material, so it won't choke your printer. This paper prints on one-side-only, and can work on all printers - inkjet and laser.