Lang Yarns Loft knitting yarn is a pure vitgin wool yarn that knits on knitting needles 5-5.5 mm (US 7-8 / UK 6-5) for a gauge of 16 st. and 24 rows.
There are around 160 m (174 yds) in a 100g (3.5 oz) skein so plan on:
650g = 7 skeins for Men size M
500g = 5 skeins for Women size M
400g = 4 skeins for Children 10 yrs
Machine washable at 30°C (86°F) with detergent for wool without softener, low iron.