We needed a couple more blankets for Connor and I didn't want to spend $14 on them when they were just a piece of cute fabric. Why not make my own? The other benefit besides saving money is that you can make them whatever size you want.
I bought some cute flannel fabric and washed it before beginning. Then I trimmed the edges to the size I wanted for the blanket plus a 1/2 seam allowance.
Here's the corners up close where I cut out the triangle.