The following measurements are the dimensions of the actual product, not of the pet they fit. After measuring your pet, make sure all measurements fit within the following dimensions (with a little room to spare in the neck).
- X-Small Neck: 7"-10" Pets Weighing: 3lbs.-5lbs.
- Small Neck: 10"-12" Pets Weighing: 6lbs.-10lbs.
- Medium Neck: 12"-14" Pets Weighing: 11lbs.-15lbs.
- Large Neck: 14"-19" Pets Weighing: 16lbs.-32lbs.
- X-Large Neck: 19"-23" Pets Weighing: 33lbs.-45lbs.
- XX-Large Neck: 23"-26" Pets Weighing: 46lbs.-70lbs.
- XXX-Large Neck: 26"-31" Pets Weighing: 71lbs.-100lbs.
