Dog Hats are fashionable and functional by protecting your Doggy's eyes from the harsh sun. This visor hat style fits comfortably over the ears with enough brim to shade their eyes. A comfortable adjustable strap under the chin to ensure the perfect fit.Made from Cotton Blend Canvas your dog will look stylish while being sun smart! SizeDiameter between EarsHead CircumferenceHat Brim SizeM11.0cm to 13.5cmUp to 44cm5.0cmL13.5cm to 16cmUp to 54cm5.5cmXL16.0cm to 20cmUp to 64cm7.5cm