Polka Dot Pink Dog Hat:- Cotton Poly Blend- Adjustable Chin Strap- Machine WashableDoggy Threads dog hats are made of durable poly cotton blend. I make each piece and ensure you the highest quality. These are durable machine washable and come in sizes from Extra Small to XXLarge (XL &XXL - Add $1). You can find various fabric patterns for both boys and girls. Please verify the size of your pet's head and get the best fit using the size guide illustration. Hat Sizing GuideSize | Head Circumference | Ear to Ear | Breed XS | 8" to 9" | 2.5" | Chihuahua, Teacup S | 10" to 11" | 3" | Yorkie, Italian Grehound M | 12" to 13" | 3.5" | Jack Russel, Maltese L | 14" to 15" | 4" | Beagle, Cocker XL | 16" to 17" | 4.75" | Autralian Shepard, Doberman XXL | 18" to 19" | 5.5" | Lab, German Shepard