We love our dogs and treat them as our children then why do we instill pain? We often complain about our dogs running away and hence, put a leash on them. Leashes are a lot painful and can often lead to choking.Now use Harnesses that are cozy, pleasant, reflective and choke-free. With no choke design and ergonomic no pull design, they are an ideal gift for all your pet owner friends. Moreover, we ensure complete comfort as the pulling pressure is evenly distributed. This guarantees protection from pulling as well as choking.Our Mesh allows your dog ease of comfort and permits natural movements. Dress up your dog in a range of colors - Black, Orange and Green.Please refer to our Size Chart before buying: Small - Neck Girth: 10"; Chest Girth: 10"-18"; Fit for Dogs: 5-10lbs Medium - Neck Girth: 12.5"; Chest Girth: 14"-21"; Fit for Dogs: 11-20 lbs Large - Neck Girth: 14"; Chest Girth: 20"-28"; Fit for Dogs :20-51 lbs Extra Large - Neck Girth: 15.5"; Chest: 22"-30"; Fit for Dogs :51-70 lbs How Can I choose the size for my dog? Step 1. Please kindly measure your dog's Neck Girth ; Step 2. kindly measure your dog's Chest Girth ; Step 3. Please refer to your dog's weight. Step 4. If between sizes, choose the large size. You should be able to fit 2 fingers under the straps, because this dog harness is adjustable. This "3 steps"is much more accurate than"only measure by Chest Girth" For example: Your dog's neck girth is 12", chest girth is 16", weight is 19 lbs. Base on the steps above: 1.Neck Girth : 12" 2.Chest Girth : 16"± 3"=20" 3.Dog Weight : 19 lbs So , M is best choice.