Next I cut diagonally from the bottom to the arm hole.
I don't know why this picture is smaller...
I removed the collar and spent about 15 minutes getting the length right and cutting and recutting the collar.
Next was folding over fabric in the arm holes and sewing that. Then I pinned the collar back on and sewed it. Finally I sewed up the sides. I didn't have to worry about hemming the bottom because I left it intact from the sweater.
She looks adorable in it and I was able to reuse something that didn't fit me right anymore.