This recovery collar is light in weight, soft and comfortable, suitable for cats / kittens / small dog. How to accurately measure your pet's size? To find the right size collar for your pets, you will need to take 2 measurements: 1. Soothing your pets 2. Measure the head circumference, assuring that you pets' head could go through the cone. Measurements : -------------------------------- Neck Girth Approx. Weight S -- 4.7 – 8.6” (12 – 22cm) 2.25.5 Lbs. M -- 6.3 – 12.2” (16 – 31cm) 5.211.0 Lbs. There is an adjustable strap on the opening of the collar, you can adjust the strap for a perfect fit. This cone can keep your pet from licking the wound, speed up wound healing. The recovery soft cone does not obstruct the pet's sight. Not effecting pet on eating, drinking, sleeping and playing. After surgery, cats or pets like to lick the wound, this cute cat cone is necessary for your pet to keep him/her from licking the wound, speed up wound healing. Adjustable strap design help to adjust to the best size for your pet. This Recovery Soft Cone does not obstruct the pet's sight, he/she can eat, drink, sleep and play normally.