GameWear MLB Boston Red Sox Reflective Dog Collar Neck Sizing Chart: Toy fits 6 - 10 inches Small fits 10 - 14 inches Medium fits 14 - 20 inches Large fits 18 - 26 inches Reflective Material Officially Licensed Protect your four-legged buddy and show off your favorite MLB team in style with this REFLECTIVE GameWear collar;  Each officially licensed collar is made from comfortable reflective material and adorned with your favorite teams logo Neck Sizing Chart: Toy fits 8 - 12 inches Small fits 10 - 14 inches Medium fits 14 - 20 inches Large fits 18 - 26 inches Wear your love, wear the game