Black and purple spider costume for dog. Tag says size large. 18”. The 18” is a measurement down the back. There are slots in the spider head part where the dog’s ears can go through. There are two Velcro bands: one that goes under the belly and one that goes under the neck. It is 26” across the belly Velcro bands and back material. It is 22” across the neck Velcro bands and back. The eyes light up red with a battery.