This is my second full size afghan. I saw the 5 dc shell stitch in the book, The Happy Hooker by Debbie Stoller, and on the internet at Knitting Dragonflies. I wanted something to crochet while watching movies, and this stitch is very easy to remember. The appearance of this stitch can differ quite a bit by using different weight yarns and hooks. I used TLC Heathers acrylic 10 ply yarn and a size I hook for this afghan. It is very heavy. I will probably add a border to it eventually when I find the perfect color.