Wanna dress up your big dog for Halloween? Then you need this cute Ariel Mermaid costume! This is a size XXXL. Fits dogs on the size scale of a Labrador or Golden Retriever. I have a golden retriever/German shepard mix that is 80 lbs and it fit her! Bought new. Used one time for like 15 minutes. Jazzy was not a fan of the dress up game!!!