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 strengths of +1.00, +1.50, +2.00, +2.50, and +3.00, suitable for both men and women. MULTIPLE APPLICATIONS: Ideal for reading and writing, as well as detailed tasks like sewing, crafting, DIY projects, and working with electronics. Perfect for use with mobile phones, tablets, and computers. Suitable for home or office use. Material: Resin Size: Total lens length 11cm, lens width 42mm, lens height 23mm, nose bridge spacing 20mm