Prima Dog Helmets for Dogs, Cats, and All Small Pets - Pink Paws for small dogs 5-10 lbs. (9-11" head circumference) Designed with your pet's safety and comfort in mind from Prima Dog Give your pet serious style with a bit of protection Visor shield them from the sun, wind and irritant objects Light weight, durable, padded inside for sung fit and come with adjustable chin strap Best Fit: 9 - 11 head circumference. Please measure the circumference of your dogs head (around their forehead) with measuring tape.