Worsted yarn is a number 4 yarn and sits between DK and chunky yarn in terms of thickness. It can come in a range of ply, but it usually sits at the higher end of the ply scale with around 8-10 ...

Yarn: Knit Picks Heatherly Worsted, 1 skein Sweet Bing (218yds/100g), or other worsted weight yarn that gets gauge (category #4) Needles: US Size 6 (4.00m) and 7 (4.5mm) circular for magic loop ...