Size: S: 36cm * 1cm, neck circumference 36cm, M: * 52cm * 1cm, neck circumference 52cm. The scent of essential oils evaporates when exposed to air, so you can use it with confidence without harming your pet's body. The collar is made of durable nylon, which is soft and very light, so it is gentle on cats and dogs. It is made of sturdy and durable nylon material, so it is gentle on pet hair, not affected by oils, easy to wash, and easy to dry. It contains elements such as strawberries, avocados, pineapples, and bears, making it beautiful and cute. The vivid colors make your pet look adorable and elegant. It has a stylish design that stands out even outdoors or in the park. This pet collar emits a scent to create a protective layer and repel invading mosquitoes and fleas. It is a product that allows you to enjoy walks, travel, outings, running and jogging with your beloved pet in a fun and comfortable way. We made the collar as thin as possible so that even cats, many of whom dislike wearing collars, could wear it, making it lighter and more comfortable to wear. It also makes a great gift for friends and relatives who have dogs or cats.