This is a set of two dog clothes: a hooded tank top and a sleeved shirt. - Material: Cotton Neck: approx. 20cm, Chest: approx. 29cm Please note that these are amateur measurements, so there may be some error. I am selling these because the size didn't fit my dog. Although they are unused, please understand that they have been stored at home before purchasing. The size is small, so I think it's suitable for Chihuahuas, puppies, and other small dogs.