Muffin's Halo Guide For Blind Dogs - Quarterback Style Muffin's Halo for Blind Dogs is a 3 piece must-have device that helps blind dogs transition to become familiar with existing or new surroundings quickly. Designed to fit a dog's girth measurement of 30" - 32" (fattest body part area) See size chart in photo section This twice-patented blind dog product offers head protection, and is highly recommended by Animal Ophthalmologists and Veterinarians worldwide As seen in the News all over the world! "I think Muffin's Halo Guide For Blind Dogs is a good tool to help augment the lives of our patients with vision loss." Christin Fahrer, DVM, MS, DACVO Eye Care For Animals