Coat size is determined by measuring from the base of the neck to the base of the tail.
Be sure your dog is standing squarely, with it's head up while measuring. With the dog looking straight ahead, measure from the point where the neck joins the body to a point near the base of the tail where you want the coat to finish.
Sizes go up in even numbers. If your dog is particularly large round the body then you may need to order a larger size.
If you would like advice as to other measurements then please contact us. It may be possible to have a coat specially made to fit your dog if the standard sizes are not suitable.