Size: XL--16 x 54 cm / 6.3 x 21.3 inch, the visor edge of hats: 7cm / 2.7 inch. Materials: Nylon or Canvas.Adjustable non-elastic Strap: Neck girth（Max）:13.7''/35cm. Visor design, handsome and protect your baby dog from sun, make your puppy look more cute and charming. Cool and fashion. Perfect gifts for your beloved baby pet dog. With two holes at the top, breathable and comfortable. Attention: The Size S will fit x-small dogs, Size Medium will fit small dogs, and Size Large will fit medium and large dogs. Please kindly measuring your dogs before you buy it.