Aran & Worsted
Aran weight wool is a medium weight yarn commonly used for jumpers and cardigans. It is thicker than a DK yarn but thinner than a chunky yarn.
Worsted weight is a yarn widely used in American knitting patterns. It is thicker than a DK weight yarn and very close to an Aran weight; in fact the two can often be substituted for one another, which is why we've grouped them together. Always remember to knit a swatch first if when doing any yarn substitutions to ensure your gauge is correct.