Function and Size: 20x magnifying glass, made of optical glass; 15.5 wide; most 20x magnifiers are 10cm. This is the new 15.5cm size. Features: The mirror with an adjustable handle can be used in 3 ways: pocket mirror, portable, or foldable to fit any size surface. 20x zoom on one side for close-up applications and vice versa for true photos. This is the most powerful magnifying glass that enlarges the area you want to focus on. If you want to see your entire face, the other side is for that. Note: The 20X magnification is very powerful, it must be very close to your face, otherwise you may see a distorted face. About 3 cm from your face (but less than 7 cm from your face), then slowly move until you get the best focus to ensure the image is sharp. \"If you stay further away, you will see nothing in the mirror, upside-down images, or distorted things. Warm Tips: If you have never tried 5X, 10X, or 15X magnifying glasses, etc., you may not like this 20X lens because this magnification is very strong. This mirror is designed for people with poor eyesight or thin makeup. If you really like 20X mirrors, we also have different sizes. Check out our store for a larger 20X mirror. Make sure you understand this before purchasing.