Large arm holes so it can fit a wide range of people, but probably not much bigger than a woman's size 10 USA.
So you need to wear a top underneath. I used a yellow turtleneck and then I had a red knit beret to sort of represent a Marashino cherry. But I can't find that.
You can also stuff the inside with something like some pillows, to make it more three dimensional (like a cupcake)
"One size fits all" somewhat roomy (you can be tall, but you need to way under about 75kg)
Fastens with velcro.