Size:S/M/L/XL Size-------------------Inner Diameter----------------------Outer Diameter S----------------------3.00cm/1.18"-----------------------11.00cm/4.33" M----------------------4.00cm/1.57"---------------------13.00cm/5.12" L----------------------4.50cm/1.77"-----------------------18.00cm/7.09" XL----------------------5.00cm/1.97"----------------------19.50cm/7.68" Specification: Scene:Summer, Outdoor, Hiking Travelling. Type:Pet hat, Pet dress-up hat. Suitable for dog breeds:Poodle, French Bulldog, Pug, Chihuahua York, Labrador, Dachshund, Terrier, Teddy, Golden Retriever, Corgi.Suitable for cats:All cats. Suitable for large, medium, small dogs cats to wear. Feature: 1.Comfortable: Cotton canvas fabric durable and beautiful. Designed with ear holes at the top and the adjustable chin drawstring, convenient and comfortable to wear. 2.Outdoor hat:Protect your pet's eyes from sun rays. Let your pet enjoy various outdoor activities in the sunshine, share your meaningful moments. 3.Photo props:Cute and fashionable dog hat for your puppy, let your pet looks very cute in the photo. 4.Eye-catching hat:Make your dog looks like beautiful, let your dog unique and attractive. Package Included: 1pc* Pet hat Note: 1.Please allow slight deviation for the measurement data and make sure you do not mind before ordering. 2.Due to the difference between different monitors, the color may be slightly different from the pictures, pls take the real item as the standard.