The Shell Stitch Blanket by The Stichin’ Mommy was fun to make! This is great for advanced beginners to intermediate skill levels. My blanket (as well as the one in the pattern) was made with Lion Brand Cotton Ease yarn which has unfortunately been discontinued. Most standard worsted weight yarns would still work fine. I used a J hook for the body, and an H hook for the border. It ended up approximately 35 inches square.