The listing, Dog Costume Devil Medium has ended.OMG how adorable!!! Devil Costume for your fur baby!!! It says fits all, it is adjustable, but I would think it would work best on a medium, like a cocker spaniel sizied dog. Brand new, I just took it out to take the picture! Has a separate head piece as shown with Golden Horns!!! lol. Please who ever wins this take a picture and email me!!!