CHOOSE CORRECT SIZE FOR YOUR DOGPrevent Size does not match yourpet's breed size or weight. Pls measure carefully before purchasing for your puppy. and pls refer our sizing table to find the most suitable size for your dog before you purchasing. Our product totally have 4 different size and the measurement of Size S= Chest: 13.4-18", weight= 8.8-13.2 pound. M= Chest: 18-22",weight= 13.2-24.3 pound. L= Chest: 22-26",weight= 24.3-38.6 pound. XL= Chest: 24.4-28.3".weight= 38.6-53 pound. NO PULL & NO CHOKEThe dog halter harness has 2 custom-designed sturdy metal D-rings that are easy to loosen and reduce finger pressure, Inner mesh inner layer keeps your dog cool and comfortable. helping to disperse pulling force. Easily control your dog while walking, training, etc. to anti-suffocation or neck strain. SAFETY FUNCTIONNylon ribbon with reflective material, reflective dog harnesshigh visibility at night, connected with reflective Oxford Material ribbon is soft high-quality PU leather, dual quality protection, so that your dog wears this chest strap is noble and comfortable, whether walking or riding in the car is easy to wear seat belt. EASY TO USEThe step-in dog harness with 2 adjustable buckles that can be adjusted according to the size of the dogge chest, when the leash is off, the harness stays intact. easy harness for dogsand the vest can be easily put on and taken off in just 3 steps. HIGH QUALITY, LIGHTWEIGHT AND COMFORTABLEOur no escape dog harness with High quality breathable sponge pad breastplate. Industrial standard high quality stainless steel 2 D-Ring is plated durability and wear resistance. light weight dog harness well-made and has no burden on pets.