🌟【Size & feature】— Outer diameter size: 2.76 inch(70mm)/Inner size: 2.24 inch(57mm). Fits for regular mouth mason canning jars, not suitable for wide mouth jar, JARS NOT INCLUDED. It also could be use for the rainy day, snow day because of the waterproof. 🌟【About our products】— Please switch “ON” the mason jar light lid before putting them in the jar, after 5-8H direct sunshine by solar, then they can last 8-12h at night. The solar powered mason jar lid light will turn on when it gets dark, and turn off automatically in the day time. 🌟【Environmental protection】— Environmental protection: A 100% solar powered solar panel, requires no external wiring and AC, so it's easy to get it all set up. It’s recommended that put the mason jar solar lights in the sun for charging full time before using. 🌟【Widely use】— You can put the firefly jar lights anywhere, perfect for the garden, weddings, balcony and daily outdoors decoration, creating a warm atmosphere in your life. It could be used as outdoor lantern or the gifts for the Christmas