Sizing Information: To determine proper back strap and frame length, measure the entire head circumference across the eyes and around under the ears. To determine proper chin strap length, start measurement just under one ear, go under the chin and back up to under the other ear.
K9 optix medium copper - k9 optix sunglasses for dogs are the first and only sunglasses designed just for dogs. - they have a super wide nose bridge (because dogs have really big noses) and unique three strap system that keep the lenses away from the dogs eyes and out on the bridge of the nose, where they belong. Dont let the lenses of ordinary sunglasses touch your dogs eyes, it could cause serious damage. With k9 optix, youll be the coolest dog in town (and the safest!) these will make any canine companion look cool! so super stylish you might just want to keep them for yourself. They are the essential accessory for every fashionable canine! features: -soft elastic adjustable head and chin straps -100% uv protection -anti-fog -shatterproof size chart extra small -dog size: 1 - 10 lbs -head strap and frame: 5 - 13 inches -chin strap: 3 - 7 in -breed example: chihuahua, pom small -dog size: 9 - 25 lbs -head strap and frame: 12 - 20 inches -chin strap: 4 - 8 inches -breed example: beagle, westie...