Reminder-Please accurately measure the size of your pet before placing an order If the dog's sternum is between two sizes, it is recommended to choose the larger size. NO PULL & NO CHOKE-There is an alloy towing hook on the back of the strap. You can tie a leash to control the puppy when walking, running, shopping and training, you can enjoy freedom and safety. Safety-The reflective tape ensures that the car can see the dog in the dark and low light conditions. Comfort-The front fabric is made of breathable and comfortable polyester, so the dog will not feel stuffy. The reverse fabric is delicate and soft, with dense weaving and non-sticky dog hair. Easy to wear-The adjustable shoulder strap can fit the dog's body better. The button can be fastened after the velcro is attached, which is safe and firm. Size: S: Chest circumference (28-38cm); neck circumference (24cm); reference weight (3-5g)M: Chest circumference (37-47cm); neck circumference (30cm); reference weight (5-8g)L: Chest circumference (42-56cm); neck circumference (35cm); reference weight (8-12g)XL: Chest circumference (46-61cm); neck circumference (37cm); reference weight (12-15g)Color: as shown in the picture