Next sew the front and back head pieces together along the whole outside. Attach the bow, and the whiskers. Then I had her try the mask on and I marked where her eyes were. Lastly I cut out the holes for her eyes, added the nose and then I rounded out the bottom a little to make sure it had the proportions all right.
I didn't really put together a tutorial for the outfit but I can give you a quick rundown. I used the cheap costume knit in a bright red polka dot. I cut out a front and back tank dress shape. (super simple) Then I sewed it together at the shoulder and sides. I added a small pleat to the front and a little white bow. Then I called it good. For the underneath I made a simple white long sleeve tee (like this one but long sleeves and no bow), and some white leggings.
Here are some from halloween past: