"With a generous 1.5" profile, these back-stapled canvases have all the benefits of traditional canvases in a more decorative size. Each canvas features cotton canvas primed with a titanium acrylic gesso primer that's acid free and archival quality, and the medium tooth surface is ideal for acrylic and oil paints. They're perfect for a creative series, dimensional projects or polyptych paintings. Details:White4" x 4" (10.1cm x 10.1cm)1.5" (3.7 cm) wood frame profile9 piecesCottonAcid free, archival qualityAcademic level 1For use with acrylic and oil paints"