All the garments are hand sewn so that they can work in tiny detail, even making a map for visible stitching so that when the film is expanded to the size of a movie theater screen it looks consistent. They might have 40 versions of a costume in use so it really does matter.
The costumes in Coraline are gorgeous and if google is to be believed then the main characters yellow raincoat is the most popular garment in the movie, among cosplayers at least, but I'd have my own starry jumper if I could pull anything out of the computer screen. It's pretty and feminine but it looks so comfortable that you could wear it almost all day, every day and not get bored.
Maybe when I've cut down on my fabric stash a bit I'll go searching for the right sweater knit and the right silver fabric? It wouldn't be that hard to put together, even if the stars might be time consuming. What do you think?