Winproof Large Dog Sunglasses with Adjustable Strap, UV Protection, Soft Goggles for Medium-Large DogsBrand: NICERINC PET Color: Blue Silver Features: Product Size: The upper part of the curve where our glasses fit snugly on the dog is 7inch, corresponding to the top of the head. The lower part of the curvature is 4inch, corresponding to the bridge of the nose. The product has a certain bending flexibility, so we believe it will fit perfectly. Adjustable Strap: Lens outer curvature size 9. 5*3. 75inch, headband adjustment size 13. 4~20inch, chin strap