Lang yarns Merino 70 knitting yarn, color 0115, is a heavy weight yarn composed of 98% merino wool and 2% polyester and knits on knitting needles 6-7 mm (US 9+10.5 / UK 4-2) for a gauge of 14 st. and 22 rows.
There are about 70 m (76 yds) in a 50g (1.75 oz) ball so plan on:
750 g (15 balls) for Men size M
650 g (13 balls) for Women size M
450 g ( 9 balls) for Children 10 yrs
Machine washable at 30°C (86°°F) with detergent for wool without softener, iron at low temperature.