Lang Yarns Marisa Color is a high quality multicolored crochet yarn composed of 100% Egyptian cotton and knits on knitting needles 2.5 and 3 mm (UK -11) for a gauge of 32 stitches and 44 rows.
There are about 210 meters (229 yds) in a 50 gram (1.75 oz) ball so plan on:
600g = 12 balls for Men size M
450g = 9 balls for Women size M
300g = 6 balls for Children 10 yrs.
Machine wash at 60°C (140°F) with detergent for wool without softener.