5 Size Basically For Cats and small to medium dogs Between 4-38 Pounds: <br>Size2 (for young kitten and rabbits):7.87-9.054.92; <br>Size3 (for cats and tiny dogs):9.44-10.625.70; <br>Size4 (for cats and small dogs):11.02-12.206.10; <br>Size5(for small and medium dogs):12.59-14.177.08;<br>Size6 (for medium dogs below 40 pounds):14.57-16.148.26. <br>Please measure your pets neck before purchase. For the pets with bigger head, you can choose one size bigger.<br>Breathable Mesh MaterialFar more breathable and comfortable mesh material than traditional plastic Elizabethan Collar.<br>Lengthened Closure: Ajustable closure design enables dogs and cats cone easy to wear and adjust the tightness slightly. You can ajust it according to your pets sizes.<br>Lightweight & SoftThese E-collars are light and soft, pets never feel unblance because of the extra burden. The cones seem do not exist.Specially Designed Edges: The edges are soft and comfortable, it will protect your pets necks, skin and hair. They can be used in many situations, like medical treatment, hair care, shower clean, after-care.<br>Package included:<br>1Pc