This Derwent Academy Medium Weight Sketch Paper Pad is the perfect choice for aspiring artists and hobbyists. Its medium weight 45 lb. paper is great for sketching with a variety of dry mediums. The white, acid-free pages keep artwork looking its best and won't yellow or degrade over time. The sketch pad has topbound sheets that easily flip back when it's time to start a new sketch. Sketch pad contains 50 sheets and each sheet measures 18 x 12.