Alfie Pet by Petoga Couture - Paris Beanie Hat Costume (for Small Dogs & Cats) Size Small best fits 8-10 inches neck girth. 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 party hat costume is just the perfect gift for your little one! Velcro closure under the chin for easy adjustment. Easy to put on and comfortable to your little baby. One of our favorite picks for the season. You will not be disappointed with the details. Great for special occasion and weekend party. Product comes with Alfie Signature zip-lock storage bag for convenience and protection for years to come.