Unicorn costume for dogs

Available in small, medium and large, the Unicorn Costume for Dogs [Amazon] offers a comfortable, adjustable-fit design that's secured under the dog's chin, neck and chest with three rows of velcro straps.

Welcome to amazing world of pink unicorns! The mane and horn headdress will turn your pet into the cutest fairy horse ever. You’ll be proud of your dog when attending dress up parties, festivals or just walking along the street. And now imagine your kid getting this funny wig for his / her birthday. Every child will be happy to dress up the family pet as a unicorn. The dog with the horn will make the children’s party unforgettable. Don't miss a chance to take adorable pics!
Not all dogs like wearing costumes.
#Notalldogs.
Question: Is the small, small enough for a ferret?
Answer: It depends on the size of your ferret