Lang Yarns Rosealba multicolored knitting yarn is a soft yarn with merino wool wrapped in a mess of nylon for resistance.
It is made of 72% merino wool and 28% nylon and knits on knitting needles 5.5 mm (US 8 / UK 5) for a gauge of 16 stitches and 24 rows.
There are in a 100 gram (3.5 oz) ball about 300 meters (328 yd) so allow:
400 g = 4 balls for men size M
300 g = 3 balls for women size M
200 g = 2 balls for children 10 yrs.
Machine washable at 30°C (86°F) with a detergent for wool without softener.