Heavyweight 140 lb. cards offer the attributes of a watercolor paper, but with a vellum drawing finish. They are ideal for watercolor, gouache, acrylic, graphite, pen & ink, colored pencil, marker and collage. Envelopes are included. Acid-free 10-pack. These cards can be used to design a greeting for any occasion from birthdays, holidays, and invitations to general correspondence. Full size matching envelopes are 5 1/4" x 7 1/4".