For Christmas, a mom from dance said that her daughter wanted a Harry Potter robe for her American Girl Doll. She said that there was no pattern for this, so she asked me to make one instead! I thought that I would be able to find some patterns to go off of but that really didn't work out.
I first bought the book All Dolled Up by Joan Hinds. It is full of doll and matching girl patterns. I decided I would use the long sleeve t-shirt pattern, just make it longer and add a hood.
So then I went looking for a pattern with a hood and there was none in the book. I found a McCalls pattern in their Crafts line; number MP471. There were three options with a hood so I knew one would work.