The Derwent A5 Portrait Sketch Book is perfect for all of your drawing needs. It has an internal storage pocket, as well as wider rings to accommodate extra paper. It contains 56 quality, 165gsm pages, which are acid-free. The book features a handy elastic closure to keep all of your work safe and secure. The Sketch Book is wire bound, which means that it can fold back on itself for a more comfortable sketching experience.. Internal storage pocket . Elastic closure . A5. Portrait. 165gsm. Wire bound. 56 sheets. Elastic closure . Approx. Dimensions (mm) H 218 W 180