We understand that artists have special needs for messenger bags – they want bags that do more than simply store laptops. The sketch artist insert fits perfectly into the main compartment of the bag, providing excellent storage for markers, pencils, knives, and sketchbooks. Drop your sketchbooks in the back and never worry about bending the corners of pages again! Keep your supplies organized inside and outside of the bag. Designed for Prismacolor and Copic markers, but works just as well for all kinds of art supplies. Dimensions: 13"x10" (26.5 cm x 33.5 cm)