This stitch consists of 3 unfinished double crochet stitches clustered together in each chain, separated by a single crochet stitch. To make the Bobble stitch: yarn over (yo), insert hook into chain, yo and pull through the chain (you have 3 loops on your hook , yo and pull through 2 loops (you have 2 loops on your hook). Repeat this step 2 more times in the same chain (you will have 4 loops on your hook), yo, and pull through all 4 loops.