Strathmore Artist Trading Cards - The biggest movement in art is very small. Strathmores bestselling fine art papers are now available in official Artist Trading Card size so you can create, swap and collect art with artists from around the world. Precision-cut for a clean surface, these convenient cards are available for a range of mediums ù drawing, watercolor, acrylic, oils and mixed media collage. Strathmore paper types available in trading card form: Series 300 Bristol, Series 300 Canvas Paper, Series 400 Watercolor Paper, Series 400 Acrylic, Series 400 Textured, and Series 500 Illustration Board. Sleeves, Envelopes, and Frame Cards also available.