Great for patio lighting, walkway lighting, garden accents, and more. Use as an adorable night light that illuminates items you add in the jar. Great project for kids too (with adult supervision). Fits any standard Mason, Kerr, Ball or similar canning jar, and is the same size as a regular jar lid. Use these lights outside or inside. Water-resistant solar cell, replaceable and rechargeable battery, and bright LED are tucked inside this standard size mason jar lid. Mason Jar is not included. Will not fit wide mouth jars.