Summer Sun Hats specially designed for small pet dogs. 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 unique. Perfect gifts for your beloved baby pet dog. With two holes at the top, breathable and comfortable. Ear distance:6.7''/17cm; Ear diameter:2.2''/5.5cm; Diameter x Head Circumference :Baseball Hats: Size S: 9 x 28 cm / 3.5 x 11 inch, the visor edge of hats: 4.5cm / 1.7 inch; Size M: 10 x 31 cm / 3.9 x 12.2 inch, the visor edge of hats: 6cm / 2.3 inch. Size L: 15 x 48 cm / 5.9 x 18.9 inch, the visor edge of hats: 7cm / 2.7 inch.