LIGHTWEIGHT DESIGN: Silicon Valley Rectangle Reading Glasses, Keychains and Readers are feather-light and engineered to grip with gentle pressure. CUSTOMIZABLE: Allows you to read comfortably wherever you are without straining your eyes. EASY TO CARRY: These foldable reading glasses fit into the keychain case, making them portable and convenient to carry in your wallet, pocket, or bag. MULTIPLE OPTIONS: Available in a range of strengths: +1.00, +1.50, +2.00, +2.50, +3.00, suitable for both men and women. MULTIPLE APPLICATIONS: Ideal for reading and writing, as well as tasks requiring close-up focus such as sewing, crafting, DIY projects, and working on mobile devices, tablets, or computers. Practical for use at home or in the workplace. Material: Resin Size: Total lens length 11 cm, lens width 42 mm, lens height 23 mm, nose bridge spacing 20 mm