Lang Yarn's Soft Cotton | Worsted Weight 100% Cotton Yarn
Amazon.com: 6x60g Yarn for Crocheting and Knitting; 6x66M Cotton Yarn for Crocheting and Knitting with Easy-to-See Stitches; Worsted-Weight Medium #4; Cotton-Nylon Blend Yarn for Beginners Crochet Kit Making
Alpaca & Wool Yarn - Heavy Worsted – Great Lakes Fibers
Worsted weight yarn comparison – PlanetJune by June Gilbank: Blog
Heavy Merino - Knitting for Olive – La Mercerie
2oz Medium Weight Cotton Blend 107yd Yarn by Big Twist | JOANN