Lang Yarns Earth knitting yarn, from the Wool Addicts collection, is composed of 50% alpaca, 35% acrylic, 15% wool and knits on knitting needles 5.5-6 mm (US 7-8/UK 6-5) for a gauge of 12 stitches and 18 rows.
In a 50 gram (1.75 oz) ball there are about 65 meters (71 yd) so plan to knit:
650 g = 13 balls for men size M
450 g = 9 balls for women size M
300 g = 6 balls for children 10 yrs.
Machine wash at 30°C (86°F) with detergent for wool without fabric softener.