Lang Yarns Mystery knitting yarn from the Wooladdicts collection is a yarn composed of 92% extrafine merino wool superwash, 8% nylon and knits on knitting needles 8 mm and 9 mm (US 11-13 / UK 0-00) for a gauge of 13 stitches and 21 rows.
In a 50 gram (1.75 oz) ball there are about 110 meters (120 yd) so plan on:
550g = 11 balls for men size M
400g = 8 balls for women size M
300g = 6 balls for children 10 yrs.
Machine wash on a wool cycle et 40°C (104°F).