100% cotton. Closed dimensions: 8” wide x 11” tall (with cinch buckle closure) Open dimensions: 20.5” wide x 11” tall (with flap open 14.5”) Two large interior pockets: 7” wide x 8” tall, are big enough to hold a sketchbook, journal or diary. Nine slots to hold your items, from 1” to 3.5” wide openings. Depth of slots is 3.5” – 6” Five 1” slots hold drawing tools, brushes, crochet hooks, double pointed knitting needles or other small tools. Two 1.5” wide slots One 1.75” wide slot One 3.5” slot for wider items. Zippered pocket is 4.5” wide x 10”tall.