These A-Z tabs are made from quality 110# white index stock. Colored Mylar covers the alphabetical tabs for added durability. Tab letters A through Z are printed on both the front and the back of the tabs. The 3¾ x 6¾ size is perfect for keeping your small portable address book organized. The brightly colored tabs are easy to find in your binder. They extend ½ inch from the page margin so they always stay in view.