Neck size adjusts 8? to 11?. Depth is 5.5?. I Bought this when my dog was going to need surgery. Fortunately he ended up not needing it. I never used it, just tried it on him. See 2nd and 3rd picture there are two minor manufacturer flaws. Does not effect the use. Not sure if it had a tag but there is none on it. It has been sitting on a shelf, I wrapped in plastic to keep clean in case I ever needed it. Vet One Calmer Extended-Use Comfort Collar is the premium extended-use collar and the most popular collar among veterinarians. Incorporates an EasyFeed opening to allow animals to eat and drink without removing the collar, and the blue inner lining has a calming effect; making the Calmer a Fear Free product. Key Features EasyFeed opening allows animals to eat and drink with ease Soft blue inner lining has a calming effect Multi-color Velcro strips for adjustable sizing Machine washable A Fear Free Preferred Product Downsizing so selling some personal items besides all of the new items from my store I sell. To combine shipping, or put them in your cart and buy together. Or contact me. shipping in the Continental US is shown. We will ship Internationally on most orders. If you live Internationally or outside the Continental US contact us before you bid and we will give you costs. We ship to Canada, Europe, Germany, Australia, Shipping Policy Orders are processed and shipped from our North Carolina .