Now even the smallest dog can have a waterproof collar. This collar is 1/2 inch wide. The size 12 will fit a 8 inch to 10 inch neck. The size 14 will fit a 10 inch to 12 inch neck. This collar can be cut down to fit smaller size necks and have holes added without burning or melting. The width of this collar (1/2 inch) is too narrow for a rivet on name plate to fit on.