Double Knitting weight is in general double the thickness of 4ply yarn and usually the most widely used weight. Suitable for most garments and relatively quick to knit up. The recommended needle or crochet hook is 3.5mm to 4.5mm. The Double Knitting yarns that we stock are suitable to most standard Double Knitting Patterns, so will adapt to your favourite pattern for your project. It is advisable to always make a 10cm x 10cm square to check tension to adjust needle or hook size if required.