Lang Yarns Donegal knitting yarn is a pure wool yarn made in the true Irish tradition, knits on knitting needles 3.5-4 mm for a gauge of 22 stitches and 30 rows.
In a 50 gra ball there are about 190 meters (207 yd) so plan on:
450 g = 9 balls for men size M
300 g = 6 balls for women size M
200 g = 4 balls for children 10 yrs
Hand wash with detergent for wool without fabric softener.