Winter Wishes Holiday Greeting Cards | Boxed SetCotton rag paper is the perfect example of tree free, upcycled and recycled paper. As a natural product, cotton is completely biodegradable. Cotton bits, usually the by products of manufactured cotton cloth, are color sorted, chopped, and pulverized then mixed with water and laid out to dry. The process takes about three days. Inside: Blank * A1 size (3 1 2" x 4 7 8") * Recycled Cerulean Paper Envelope * Printed on Tree Free Cotton Rag Paper * Plastic