Has your knitting project gone wrong? One of the most common problems that you can face is using the wrong size of needle. Before you get started, make sure that your needle size is right, and it'll be smooth sailing!
Gauge issues - the pattern suggests 4mm needles but I can only get
a comparison between yarn weights and needle sizes — Woolly Wormhead
Understanding Knitting Needle Sizes & Yarn Weights
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Guide to Sizing
a comparison between yarn weights and needle sizes — Woolly Wormhead
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Chunky Knitting Needles and Crochet Hook Size Guide