Lens is 2-3/4 inches in diameter, or 3-14 inches including the frames (color of frame may vary) Makes objects look smaller because of it's concave lens - weighs 4.9 ounces Many visual applications - used in classrooms as a teaching device Comes with 16-inch nylon lanyard for you to wear around the neck Comes with rubber frame (please note: finishing of rubber is rough and product may appear used because of it, but it really is not) with indented area to hold with your thumb and finger Maximize 3" (7.5 cm) Double Concave Reducing Lens is a precision-crafted tool designed for artists, educators, and anyone needing to view objects from a distance. This lens, measuring 2.75" (7 cm) in diameter or 3.25" (8.3 cm) including the frames, is engineered to make objects appear smaller due to its concave shape. Its numerous visual applications make it an invaluable teaching device in classrooms, helping students understand concepts related to optics and visual perception. The lens comes with a 16-inch (40.6 cm) nylon lanyard, allowing it to be worn around the neck for convenience. Additionally, the indented rubber frame ensures an ergonomic grip for extended use, making it comfortable to hold during detailed examinations or artistic endeavors. Whether you're an artist wanting to see your work from a new perspective or a teacher demonstrating optical principles, the Maximize Double Concave Reducing Lens is an essential tool for your toolkit.