American Tourister Auto Safety Harness for Dog- Size Large Measure around the base of your dog's neck & chest for correct size. Large: Neck- 16"- 20"; Girth- 24"- 32" Padded mesh for comfort/ adjustable straps. Leash attachment. Use with tough leash (sold separately). Made of durable high test material. Made of polyester, excluding trims & hardware. Easy to use seat belt attachment.