The FRANKLIN PET SUPPLY CO Reflective Comfort Nylon Collar is constructed and stitched with premium nylon filament and lined with a super soft neoprene inner layer for ultimate comfort between your dogs neck and collar. The collar features a reflective weave for visibility at night. A quick release plastic buckle and easy size adjustment for a perfect fit. Heavy-duty stitching for lasting quality, welded metal D-ring in gun metal and anti corrosive finish. Please look at the size chart for the recommended collar size. SMALL 3/4″ X 11″-16″ (2.0×28-40cm) MEDIUM 1″ X 14″- 20″ (2.5×35-51cm) LARGE 1″ X 17″- 26.5″ (2.5 x 42-67cm)