This flexible little telescopic monocular clips on to any standard eyeglass frame, and can be easily carried in a pocket. Outside measurements are 2.25" in length x 1.5" in diameter. With special reading lens cap it becomes a handy magnifier. 0.50D, 1.00D, and 2.00D lenses are inclueded for best reading power. Also included are lens cleaning cloth, and zipper carrying case.