Thank you, have a nice day Quality stores at your service type: Table magnifier model : A4 flat magnifier Magnification performance: 6 times Effective diameter: 297 * 210 (mm) Material: PVC number of boxes: 1 piece Convenient reading magnifier so that lowercase letters are no longer displayed in Chinese. Ideal for home, study and office. Ultra-thin magnifying glass makes it easy to read even the smallest letters in contracts, newspapers, magazines, books and maps. Just place it some distance from the text> Seller reminder. 1, the size is manual measurement, please allow the error (1-3cm). 2, due to different monitors, some items may have errors, please refer to the actual product. 3, after receiving the package, any dissatisfaction, please contact me first, do not easily leave any negative comments, thank you, good afternoon.