Non Pull Training Dog Harness is very easy to use and simple to fit. The elastic web and mesh that cover the dog"s chest, stretch and give with his natural movement, this allows maximum comfort for the dog, whilst giving the handler total control. Fabric "Sherpa SleevesÂTM" provide extra comfort to eliminate rubbing. Available in black, sizes Small, Medium and Large. Measurements: Small - Neck Circumference 9-12" Medium - Neck Circumference 12-17" Large - Neck Circumference 16-24" click here for recommended size guide