S:34-35cm, M:37-39cm, L:40-44cm XL:50-51cm PREMIUM MATERIAL: The quality Oxford fabric outer layer and canvas (cotton) lining are chemical free, durable and breathable, suitable for everyday use. COMFORTABLE WEAR: Designed for dogs, with ear holes in the top, this cap fits over dogs’ ears, and the non-elastic adjustable neck strap secures the cap and makes it easy to adjust. < p>BLOCK THE SUN: Strong hood with enough brim around your dog’s forehead which can effectively protect your pet’s eyes from sunlight, so your pet can enjoy various outdoor activities in the sun. (Remark: Please fold in half before using.) STYLISH AND CUTE: This fashion and unique dog baseball cap will make your dog more lovely and eye-catching, suitable for all kinds of small dogs. SIZE: Four sizes available for your selection. Please refer to the size information and measure your puppy before purchasing and take each measurement a little loose.