Olympus crochet threads are made in Japan from the highest quality cotton and are availbale in a variety of colours. The weight of the ball is 10g and the thread is 44m in length. The composition is 100% cotton and they are suitable for Japanese crochet hooks sizes 0-2/0. Length: 44m (48 yards) Weight of Ball: 10g (0.35 ounces) 100% Mercerised Cotton Japanese Crochet Hook 0-2/0 minimum 1 box