Lang Yarns Oslo knitting yarn, a savvy blend of wool and cotton, is composed of 46% merino wool, 42% cotton et 12% camel hair and knits on knitting needles 3-3.5 mm (US 3-4 / UK 10-9) with a gauge of 26 st. and 34 rows.
In a 50g (1.75 oz) ball there are about 150 m (164 yd) so for quantities of yarn plan on:
550g = 10 balls for men size M
400g = 8 balls for women size M
300g = 6 balls for children 10 yrs
Machine wash et 30°C (86°F) with detergent for wool without fabric softener.