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 50g and the thread is 218m in length. The composition is 100% cotton and they are suitable for Japanese crochet hooks sizes 0-2/0. Length:218m (238 yards)Weight of Ball: 50g (1.76 ounces) 100% Mercerized Cotton PliedJapanese Crochet Hook 0-2/0 minimum 1 box