1 1/2" wide USA made Cotton wick. Each oil lantern comes with a wick installed, but why not get your extra 100% cotton wicks now, and have the spares when needed. If you plan to use your oil lamps regularly, then a couple sets is recommended.
One set of 1.5" flat wick is 3 x 8" pieces; approximately 24" total. High quality cotton, made in the USA.