Size Choose:111.5cm neck circumference 14 - 21cm 4depth 15.5cm neck circumference 28 - 34cm 6depth 20cm circumference neck 37 - 45cm Size 1 is suitable for dogs under 6 kg cat smell 5 kg Size 4 is suitable for small to medium sized dogs or large dogs in development phase recommends measuring the neck circumference No.6 is suitable for dogs with short beaks such as fadu, Yingdou, etc. it is recommended to measure the circumference of the neck Breathable mesh material: Made of polypropylene and polyester, lightweight, breathable and comfortable. Much more breathable and comfortable mesh material than the traditional plastic Elizabethan collar. Extended radius and closure: The dog cones are wide and deep so your pets won't lick their bodies. The closure design makes it easy for dogs and cats to wear and adjust the tightness slightly. You can adjust it according to your pet's size. Prevent bites and bites. lick: This dog recovery cone is designed to protect your pet from wounds, rashes and post-operative injuries. Used to prevent biting and anti-licking, especially beneficial for wound recovery by preventing animals from licking. Widely Used: Besides helping your pet recover from injuries, the tapered dog collar can prevent your pet from biting or scratching the furniture as well as it can be widely used in pet bathing, trimming pets, etc.