Lang Yarns Yak knitting yarn is a combed yak wool yarn that knits on knitting needles 4.5-5 mm for a gauge of 18 st. and 26 rows.
In a 50g (1.75 oz) ball there are about 130 m (142 yd) so for quantities plan:
500g = 10 balls for men size M
400g = 8 balls for women size M
300g = 6 balls for children 10 yrs
Machine washable at 30°C (86°F) with detergent for delicate textiles without softener.