1---LIGHTWEIGHT DESIGN: Silicon Valley Rectangle Reading Glasses, Keychains and Readers are feather-light and engineered to grip with gentle pressure. 2---CUSTOMIZABLE: Allowing you to read whatever you want wherever you want without straining your eyes. 3---EASY TO CARRY: These foldable reading glasses fit in the keychain case, so you can put the key on the key, take it with you and put it in your wallet, pocket or wallet 4---MULTIPLE OPTIONS: The reading glasses have a strength of +1.00, +1.50, +2.00, +2.50, +3.00, suitable for men and women. 5---MULTIPLE APPLICATIONS: The glasses are especially suitable for reading and writing, but they are also very useful for work that requires more visual effort such as electricity, DIY, sewing, crafts, etc.. They are very practical for mobile phone, tablet or computer. Ideal for use at home or at work. Material: Resin Size: total lens length 11cm, lens width 42mm, lens height 23mm, nose bridge spacing 20mm