Art supplies store</em> that also has the pulse on what artists need in order to market their shows or say thank you in an extra special way. The blank cards allow you to 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. This item makes a great mother's day project for you classroom. This is a standard item on school bids for children's art kits. Cards come with complementing envelopes.