This set of 10 reading guides includes an individually wrapped, lightweight plastic strip that allows you to highlight print through a transparent tinted window. It helps maintain your place while reading, blocks distractions, strengthens visual tracking skills. This assist in concentration and focus. It is a simple tool that has amazing results. Different people are helped by using different colors so try them all. They are also handy bookmarks. 7 inches long by 1.25 inches wide with 0.25 inch highlight area