The collar is made out stainless steel about 1/2″ wide. It is rounded and polished smooth making it very comfortable to wear.
It is weighted, so you always know it there. Once it’s locked it’s almost seamless. The welded o-ring gives you a place to attached your leash, or as an anchoring point.
The metal conducts heat making it very warm after it’s been worn for a little while.
Small: inside circumference 14″
Large: Inside circumference 16″