Alfie Pet by Petoga Couture - Brittany Neck Warmer Size Small. It measures from 8.5"-10.5" and 3" wide. Sizing for each dog is unique. We highly recommend you measure your pet precisely with a flexible tape measure to ensure the best fit. Contact us if you have question. We are happy to help. This neck warmer is adorable and fabulous! Easy to put on and comfortable to your little baby. Great for every day walks and will keep your little dog warm all season long! Try one on your doggie today!