DK - 50g ball approx 155m (169yds) Tension 22 sts x 30 rows on 4mm needles = 10cms
4ply - 50g ball approx 230m (251yds) Tension 28 sts x 36 rows on 3.25mm needles = 10cms
3ply - 50g ball approx 310m (339yds) Tension 32 sts x 40 rows on 3mm needles = 10cms