Its for Dad, who Mum reckons is a 57cm head circ.
DK 100% wool, 108 stitches, 4.5mm needles.
Cast on with 5mm, way loose. No ribbing. Its not just the cast on, its the whole circumf.
Fits husband only at a MAJOR stretch, fits 5 year old son fine.
pattern said finished size 54cm unstretched 20 sts on 4mm = 4", i.e. 10sts = 5.1cm. My swatch on 4mm was more like 10 sts = 4.5cm, thats why I went to 4.5mm needles. Guess I shulda knitted another swatch, but Zzzzzzz boring !
Finished thing is 53.5cm I reckon, but it just doesn't stretch like it would if it wasn't fair isle.