I made my first nursing cover with the help of this tutorial. I was surprised by how simple it was, all you need is a yard of fabric, a bit of boning, and two D rings. I went one step further and mitered the corners of the cover. Here are two resources that will help you sew a nice mitered corner:
I used the straight folding template to press the fold lines into my fabric. Keep your fold lines nice and even and you'll have a perfect corner every time! This cover's going to my friend Kenzi, who's expecting a little girl this summer.