THE STERLING: The Sterling is a unique pair of round reading glasses that can pull double duty. The design is perfect for pushing the glasses down on your nose for a half reader, and the lenses are large enough to use as a full reader when needed as well. METAL & PLASTIC FRAME: This men and women round frame features a round style ACRYLIC LENSES: These fully magnified lenses have lightweight, plastic lenses MEASUREMENTS: Very Narrow fit with 120mm frame width, mm lens height, and 135mm temple length LENS MAGNIFICATION STRENGTH: Available in +1.0, +1.25, +1.5, +1.75, +2.0, +2.25, +2.5, and +2.75 The Sterling is a unique pair of round reading glasses that can pull double duty. The design is perfect for pushing the glasses down on your nose for a half reader, and the lenses are large enough to use as a full reader when needed as well.