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 20g and the thread is 88m in length. The composition is 100% cotton and they are suitable for Japanese crochet hooks sizes 0-2/0. Weight: 4 ply Length: 88mts (96 yards) Weight of Ball: 20g (0.71 ounces)Gauge: 28.0 sts = 4 inches 100% Mercerized Cotton Plied. Japanese Crochet Hook 0-2/0 minimum 1 box