It’s empty in here!
I have a big dog (GSD x) I measured her up and opted for the XL - it was however a little small, fitting on the maximum adjustment with no room for expansion! So I've exchanged it for the XXL size. If your dog is on the top end of the sizing scale then I'd go for the size up.
attractive well made and adjustable had small for cocker pup/then med/now lge
Very impressed with quality fit and look of this halter move up to med as now grown out of small