Gililai Adjustable No Pull Dog Collar Harness With Handle on Top - Best for Walking, Hiking & Training Canie &ndash; 4 Colors and 4 Sizes 1. Medium Dimensions: 19-23 inch neck / 24-30 inch chest 2. Adjustable straps for a customized fit 3. Comfortable padded neck opening and Double-thick nylon suture zone (Reflective Sewing) 4. Harness design reduces the tugging and pulling of traditional pet collars 5. Adjustment buckle and Security lock