Lang Yarns Cashmere Light Color multicolored knitting yarn is composed of cashmere wool blended with nylon for strength and knits on knitting needles 5.5 and 6 mm (US 9-10 / UK 5-4) for a gauge of 20 stitches and 31 rows.
A 25 gram ball contains about 85 meters (92 yd) so for quantities of yarn for a sweater plan on:
450g = 18 balls for men size M
375g = 15 balls for women size M
200g = 8 balls for children 10 yrs.
Hand wash with detergent for wool without fabric softener.