Lang Yarns Sunshine knitting yarn from the Wool Addicts collection is a yarn composed of 100% cotton and knits on knitting needles 4.5-5 mm (US 6-7 / UK 7-6) for a gauge of 18 st. and 24 rows.
There are about 95 m (103 yds) in a 50 g (1.75 oz) ball so plan on:
600g = 12 balls for Men size M
450g = 9 balls for Women size M
300g = 6 balls for Children 10 yrs
Machine wash at 30°C (86°F) with detergent for wool without softener, low iron.