Lang Yarns Baby Alpaca knitting yarn is composed of 100% alpaca wool and knits on knitting needles 3 mm (UK 11) for a gauge of 26 stitches and 34 rows.
In a 50 gram (1.75 oz) ball there are about 167 meters (182 yd) so plan on:
600g = 12 balls for men size M
400g = 8 balls for women size M
300g = 5 balls for children 10 yrs.
Machine wash at 30°C (86°F) with detergent for wool without fabric softener.