This is a dog harness. I used it when my Shiba Inu was about 3-4 months old. I'm selling it because it's become too small. It's an old item, as other dogs have used it. It's dirty and a bit worn. Photo 4: Belly area Photo 5: Neck at its shortest setting Photos 6 & 7: Neck at its longest setting. Size is unknown. Please refrain from purchasing if you are overly concerned about condition.