16 years of experience has made our Doggles ILS (Interchangeable Lens System) the very best in pet eyewear. For true eye protection or fashion, your pet deserves the very best. Doggles offer 100% UV protection, shatter-proof lenses, and anti-fog treatment on the inside of the lenses. Lenses on the ILS style are interchangeable and replaceable. This style is suited to all dog head shapes and sizes. Whether your best friend accompanies you on a motorcycle ride, hangs their head out of the truck or car, loves to sunbathe, or is sensitive to light, Doggles will be sure to keep their precious eyes safe. You can rest assured, and they'll love the extra attention! Doggles ILS are an exteremly unique product with the following characteristics: Polycarbonate (shatterproof), anti-fog, 100% UV protection lenses. Extremely flexible rubber frame. Elastic adjustable straps - head and chin. Foam lined frame for extra comfort. Extra deep lens cup keeps the lenses away from the eyes. Patented. Vet recommended! Size Weight of Dog, Head Strap Chin Strap Frame Size Breed Example XS 1 - 10 lbs 5 - 13 in 3 - 7 in 3.5in Teacup Toy sizes Chihuahua, Pomeranian, Yorkie .5 - 5 kgs 13 - 33 cm 8 - 17 cm 8.9cm Small 9 - 25 lbs 12 - 20 in 4 - 8 in 4.75in Beagle, Westie, Jack Russell, Cavalier King Charles 4 - 12 kgs 30 - 50 cm 10 - 20 cm 12.1cm Medium 20 - 60 lbs 15 - 25 in 5 - 11 in 5.5in Aussie, Border Collie, Dalmatian 9 - 27 kgs 38 - 63 cm 13 - 28 cm 14cm Large 50 - 100 lbs 18 - 30 in 7-16 in 6.38in German Shepherd, Labrador Retriever, Boxer 22 - 45 kgs 46 - 76 cm 15 - 38 cm 16.2cm XL 100+ lbs 22 - 45 in 10-24 in 7.25in Mastiff, St. Bernard, Newfoundland, Great Dane 45+ kgs 56 - 114 cm 28 - 66 cm 18.4cm *Frame is the measurement from one corner of the frame to the other (corner of eye to corner of eye across the face). *Longest strap measurement is length fully streched. Please keep in mind that breeds vary by size and that the breeds above are examples, you should go by the size and weight of your dog. The weight and frame measurement are the most important measurements. Shipping Information: Many of our products offer free shipping and unless otherwise stated, this includes all of the US. We do our best to get your order turned around and on its way to you within 24 hours with the majority of orders shipping the same day. For products that do not include shipping we will be happy to combine the shipping cost when the products are ordered and shipped together. International Shipping Information: We will ship internationally with the exception of Israel and the Russian Federation. The buyer will be responsible for the shipping costs entirely. There are a few things international customers need to know. First, all electrical items are for use with 110v only. If you don’t have 110V current you will need a transformer. Second, you are responsible to ensure the item you are purchasing will be allowed through your customs. If they notify you that you must pick-up your item from them and it gets sent back to us because you didn’t, you will only be given a refund for the product and not the shipping, after it arrives back here. This also pertains to items returned because they were denied by customs. Lastly, be aware that it will take time to reach you, in some unfortunate cases, up to 6 weeks. You will see with the tracking number we relay to you that your order shipped promptly and left the US soon after. Once it’s out of this country we have no control over the shipping service. Returns: We will be happy to accept a return of your product for 30 days after receipt. The customer will be responsible for the cost of return shipping and that the item arrives back here in good condition. If your item is returned because of an error in the shipping address provided to us or if it’s returned because delivery was refused, you will only be given a refund less the cost of the shipping even if the product cost included free shipping. Please notify us if there is an issue with your order so we can help you with returns if one is needed.