KONG Reflective Paracord Collar 2015 Model! (L/XL, Lime) KONG Reflective Paracord Collar Comfort fit for daily walks. Fully reflective lining as well Size- Medium: 1.2 inch Wide & Adjustable between 16-20 inch. Large: 1.5 inch Wide & Adjustable between 22-30 inch will fit any large breed. Please measure for best results.