Question: are aran and worsted weight the same?
Answer: Worsted & Aran Weight Yarn & Wool. Aran weight yarns and worsted weight yarns are often interchangeable, but actually different weights. Worsted weight yarn is finer and knits on 4.5mm needles, and aran weight yarn (also known as heavy worsted or 10ply) is knitted on 5mm needles.