Our Braided Round Fiberglass Wick for Lanterns is approximately 1/8 inch in diameter and is available by the yard. We call it the perpetual wick because it lasts such a long time. For indoor use, we recommend 100% paraffin oil because it has a clean burn. It may also be used with citronella, but only for outdoor use, as this oil does not burn clean. Scroll down to the From the Blog section to see our Mason Jar Lantern DIY.