Art Alternatives Economy Stretched Canvas Super Value Packs are already packed and priced for painters. Made of unbleached 4 oz cotton that has been primed with acid-free acrylic titanium gesso, giving it a finished weight of 8 oz cotton. Stretched on kiln-dried 5/8 inch fir stretcher bars, and back-stapled for a clean profile that allows for paintings to run onto the side seamlessly. For use with oil, acrylics, alkyds, and other painting mediums. 16 inches x 20 inches, pack of 5.