Size|80cm (±2cm is the normal error value) Use maintenance| It is normal for long-term use to be oxidized and darkened due to sweat, frictional contact or air. Not recommended for use in wet environments. It is recommended to store in a box or in a sealed zipper bag when not in use. Suggested match| https://www.pinkoi.com/product/WCgrkvkm https://www.pinkoi.com/product/zsACe3wv https://www.pinkoi.com/product/5ky4BHvq 【brand introduction】 Project Plus Eyes is committed to designing glasses that combine texture, comfort and self-contained personality. Under the conditions of excellent and durable materials, the "more than a little different" creativity is blended between tradition and modernity. See more possibilities is a value that encourages you to break the frame and define your own fashion.