Create original artwork on fine 5" x 7", pre-scored Watercolor Cards. Made of 140 lb. cold-press watercolor paper, they're ideal for wet media such as markers, acrylic, gouache and watercolor. Cards come with complementing envelopes. Full Size Watercolor Cards: These larger size cards can be used to design a greeting for any occasion from birthdays, holidays and invitations to general correspondence. Full Size matching envelopes are 5.25" x 7.25". Package includes 10 cards and 10 envelopes.