Lang Yarns Merino 150 knitting yarn is composed of 100% fine merino wool, knits on knitting needles 3 and 3.5 mm (US 2.5-4 / UK 11-) for a gauge of 27 stitches and 37 rows.
There are about 150 meters (164 yd) in a 50 gram (1.75 oz) ball so plan to knit:
650 g = 13 balls for Men size M
500 g = 10 balls for Women size M
400 g = 8 balls for Children 10 yrs.
Machine washable at 30°C (86°F) with detergent for delicate wash without fabric softener.