Tree Skirt Pattern by Plymouth - #P368. This beautiful Christmas Tree Skirt pattern was designed for Plymouth Encore Worsted yarn but can easily be knit in any color using any worsted weight yarn and needle size to obtain a gauge of 16sts =4". Suggested circular needle size is 9". Seven small buttons will be required. Made with durable 100% wool and perfect for those with basic knitting skills and a familiarity with Intarsia or Fairisle knitting techniques. Made in the USA.