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 100g and the thread is 436m in length. The composition is 100% cotton and they are suitable for Japanese crochet hooks sizes 0-2/0. Length:436mWeight of Ball: 100g 100% Mercerized Cotton PliedJapanese Crochet Hook 0-2/0 minimum 1 box