Choose CORRECT SIZE for your dogSize does not match your pet's breed size or weight. Measure the actual size of your pet and pls refer our sizing table to find the most suitable size for your dog before you purchasing. Our product totally have 3 different size and the measurement of Size S: 20.47-22.05(5256cm); Size M: 25.19-27.56(6470cm); Size L: 27-30"(70-76cm). Pls kindly note that the adjust part is top strip and the product adjust range around 2.36(6cm). Safety FunctionNylon ribbon, with 3M reflective material, high visibility at night, connected with 3M 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. No Pull & Choke-FreeDog harness featured with 2 stainless steel Sturdy Metal D-Rings on front/back range for attaching leash, front clip prevent pulling and back for relaxed walking. The 2 D-rings are reinforced on the extensional part which is not easily ripped off even by heavy pulling. Pulling pressure is evenly distributed to the body to prevent Choking. Easy to use Fast loosening on both sides, easy to put on and off. Our new product ABS thickened buckle on cat/dog's back, easy to wear and off, adjustable buckle on the side of the buckle can be adjusted to pet's comfortable length at any time whenever you want, tie and take down to adjust, then tie the seat belt on the 2 stainless stell D-ring, fasten the seat belt. Safe travel starts here! High quality, lightweight and comfortableHigh quality breathable sponge pad breastplate. Industrial standard high quality stainless steel 2 D-Ring is plated durability and wear resistance. The dog harness is light in weight, well-made and has no burden on pets.