The perfect field and Travel Sketchbook! These handy field sketch books feature a super sturdy black double wire spiral binding with heavy black embossed front and back cover. Each Sketchbook has 80 sheets of premium acid-free, 110 gram (70 lb.) Weight, light cream Colored paper with a fine even Surface Texture. This style of Sketchbook is great for field Use since you can flip over the Used sheets and Use the covers as a stiff backing support. The 5.5x8.5 inch, 7x10 inch and 8.5x11 inch Sizes are very popular.