djustable elastic chin straps keep the hats securely on your dog. In sizes: Teacups (dogs 1-5 lbs), XXS (dogs 5-10 lbs), XS (dogs 10-25 lbs), Small (dogs 20-45 lbs), Medium (dogs 40-60 lbs.) and Large (dogs 55+ lbs.) DOGG Hats come poly-bagged with a hang card.