Reading Guide products are designed to aid students and adults with the following difficulties: skipping words, skipping lines, reversing letters, transposing letters, losing your place, re-reading lines, squinting, concentration, comprehension, red/watery eyes and reading fatigue. Colored Overlays can help improve print clarity and stability, eliminate headaches associated with reading, improve comprehension, and allow you to read longer and with comfort. Easily track print through transparent tinted window. Each full-page guide measures 8.5" x 11". Each Starter Set includes 9 full page reading guides, 1 each of 9 colors.