Hennessy & Sons Sizes
The sizes below indicate the range of the dog collar from the smallest loop to the largest and not the exact size of the neck.
A small amount of space should always be allowed between the neck size and collar size:
Small: 18cm – 25cm / 7-10 inches; width 14mm
Medium: 29cm – 35cm / 11.5-14 inches; width 18mm
Large: 38cm – 46cm / 15-18.5 inches; width 22mm