These pieces are acrylics on paper. they are on 300-pound, 100% cotton rag, acid-free watercolour paper. The paintings are mounted and matted with a 20" x 16" mat, which we pop into a cellophane sleeve. They are then signed with a graphite pencil. Shipping is available with or without the mat, in a box (the watercolour paper is too thick and rigid to be rolled up into a tube).