silicone collar with 4 different adjust points.
Overall Length- 18.25 inches or 46.35 cm
Width- 1 inch or 2.54 cm
Hole measurements from largest- 17.75 inches or 45.08 cm , 16.75 inches or 42.54 cm, 15.75 inches or 40 cm, and 14.75 inches or 37.46 cm.