The shell stitch is popular in crochet because there is a lot of variety in the ways it can be used. You could take any version of the shell stitch and work it in rows to make a lovely textured blanket of any size. You can make an amazing blanket with this Beautiful Shell Stitch Free Crochet Pattern.
The project is not as difficult as it looks. Follow the pictures tutorial and start this project step by step according to clear instructions.