One side of these mixed media postcards is left blank for your art and the back side is printed with the traditional markings of a postcard so you can mail your piece and share your artwork. This paper combines the characteristics of watercolor paper with the finish of a drawing sheet, creating the ultimate paper for combined mediums. These cards are ideal for watercolor, gouache, acrylic, graphite, pen & ink, colored pencil, marker, pastel and collage.Details:White4" x 6" (10.2cm x 15.2cm)184lb/300gsm15 sheetsAcid-free