Has openings for the ears and adjusts under the chin with a toggle. 100% acrylic, machine wash, and dry.
For hat size, measure your dog's head: use a flexible tape measure and obtain the circumference of your dog's head..... see below image. Since these are knitted hats, they will stretch.
Our model Ozzy is a 14 lb. Yorkie and he is wearing a small.
Hat Circumference (before stretch)