Cashmere 30 by Katia is a "Concept" wool by Katia.It is composed of: 70% Merino wool and 30% Extrafine Cashmere wool.Each ball contains 25 grams and 94m.Working with needles 3 to 4 mm and crochet 3 - 3.5 mm.To knit a sweater size 42 in long sleeve, you need 12 balls.