Lang Yarns Carpe Diem sporty knitting yarn is composed of 70% new wool and 30% alpaca wool and knits on knitting needles 6 mm for a gauge of 16 st. and 22 rows.
A 50g (1.75 oz) ball contains about 90 m (98 yd) so plan on:
600g = 12 balls for men size M
450g = 9 balls for women size M
350g = 7 balls for children 10 yrs
Machine wash at 30°C (86°F) with detergent for wool without fabric softener.