Size: Only S size is available, helmet head circumference of about 14 inches. Range of strap: 16.5”-18.5”, suggest for 17-27 lbs dogs. Please measure your dog's head before purchasing. Small Dog Helmet: This helmet is lightweight and durable, which won't get any burden for your pet. Padding inside the top of the helmet, make your furry friends safety and comfortable to wear. Stay On Head Well: Designed with earhole will not press on your pet's ears, it can hold your dog's head better and not easy to fall off, give them enough space and comfort. Adjustable: The straps are designed with velcro and has a good range of adjustment. You can adjust the size according to your dog's head, easy to wear. Multi-occasion Use: This dog helmet can be use with dog goggles, colors available in pink and camouflage. Suitable for taking photos, cycling, hiking, and motorcycling. Also can be used to decorate your pet for Thanksgiving, Halloween, Christmas, or give them as a gift, etc. Helmet with ear holes for small dogs.