Size1.W:1.6.For dogs around 14 pounds(Poodle,Schnauzer,Bichon Frise etc) Size2.W:1.8.For dogs around 20 pounds (Suitable for Schnauzer and Bichon of 18 pounds).. Size3.W: 2.0.For Schnauzer,Standard Poodle. (over 25 pounds). Size4.W:2.2. For Akita Cocker Spaniel and other dog breeds of about 30 pounds. Size5.W:2.3.For border collies, cocker spaniels, and mediumsized chow chows. Size6.W:2.6. For mediumsized Satsuma, Husky, Labrador, medium and large Chow Chow. Size7.W:3.0.For mediumsized golden retrievers, such as Summer Labrador. Size8.W:3.2.For large golden retriever, German animal husbandry, Rottweiler, ancient animal husbandry, medium and large Alaska, etc. Sturdy and Nonslip: Durable and wearresistant soles and nonslip soles provide convenience and safety for the dog's travel, which can cope with most terrain without hindrance. The dog was prevented from being hurt by rocks and thorns. Elasticity: Foursided stretch fabric and highend space leather are used to make the shoes elastic and easy to wear. Reflective Webbing: low light visibility and reflective effect, you can quickly find your dog at night. Measurement methods: Let the dog’s foot step on the paper,drawa circle with the pen against the foot,measure the width. Then choose a size that is a little wider than the actual foot. (Note:be sure to step on the ground,the result of lifting the foot is inaccurate.) Package Includes:1 Set of dog boots (4PCS)