What is Category 4 Yarn? Medium worsted weight yarn (including aran and heavy worsted variants) is the ultimate, multi-purpose workhorse of the fiber arts catalog. It delivers optimal fabric thickness, excellent structural insulation, and highly legible stitch definition for timeless cabled patterns.

• Standard Knit Gauge: 16–20 stitches = 4 inches (10 cm) using US 7–9 ($4.5\text{ mm}$–$5.5\text{ mm}$) traditional knitting needles.
• Standard Crochet Gauge: 11–14 single crochets = 4 inches (10 cm) using US I-9 to K-10.5 ($5.5\text{ mm}$–$6.5\text{ mm}$) hooks.
• Best Craft Applications: Heritage cable-knit sweaters, durable winter afghans, thick textured beanies, cold-weather scarves, and plush home decor.
• Premium Brands In Stock: Premier Yarns, Berroco Vintage Worsted, Adriafil Aran, and We Are Knitters The Cotton.

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