Ann Norling Adult Socks #12 . This Ann Norling pattern is written for three gauges thereby allowing use of Fingering, DK/Sport or Worsted weight yarns. The length of the foot determines the fit of the sock (9"-13"). For a narrower foot use one needle size smaller. Wool/nylon sock yarn or 100% wool & wool blends that are tightly plied are recommended. Wool/nylon heel yarn or nylon to knit into the heel can also be used. This Ann Norling pattern uses approx 285-420 yards depending on yarn size and gauge used. Knitted on double point US needles size 3, 5 or 7.