1.Chest:17-20",Neck: 10-15.5",Recommended Weight:15-21lbs,before ordering ,please measure your pup's neck to ensure an accurate fit by size chart.2.No Pull and Adjustable---Less Coverage, More Comfort-it takes 360 degree surround design and air mesh inside can avoid hurt pups skin as possible and adopts four-point adjustment design, fits the pet's bust to reduce the possibility of breaking free.3.Durable and Reflective---Reflective material is added to ensure the safety of going out at night and the D-ring of collar,harness and leash is made of alloy material to kepp durable,safe and not easy to fade,rust.In addition, safety buckle is used to keep secure for pet in the traction part.4.Fashion and Charmful---More than just collar,harness and leash set(Three Suit)-it adopts printing technology and floral element to make your pet more attractive,when you walking dog,party,go out,etc.5.About YOITEA Services -If you have any questions, please leave your messages by email, we will reply you within 24 hours and offer you best services. If you are unsatisfie, also communicate us and let us know that, we will resolve the problem till you satisfy.