This has to be the most unhappy dog I have ever seen. They could have at least put this Circus Monkey Rider Costume on a dog that was happy about it. This dog looks like he’s plotting your death for attaching the overly excited monkey to its back. You can expect the same kind of looks from your own dog should you decide to do the same to it. The costume comes in one-size fits most, which apparently means it fits most medium size dogs. You can purchase the harness for $39.99 from Dog-A-Holics.