Made from a thick vegetable tanned leather with a floral sheepskin overlay. Adjustable 16 1/4 - 20 1/4 inches. Measure the circumference of your dogs neck with a soft tape measure or measure their current collar from the middle of the buckle (and where the material folds over) to the most used hole on the collar. 
 
NOT recommended for everyday wear for dogs that are hard on their collars, just because the sheepskin overlay is softer and a lighter colour. Basically it won’t be pretty very long if you have a dog that rolls in the dirt, etc with the collar on. More suited for just on the leash use or for a quieter indoor dog.
 
I didn’t want the collar be super thick so there is no back liner but the rivet backs are very flat and should not be uncomfortable at all for the dog.