ULTRA CHOKE FREE STEP IN REFLECTIVE DOG HARNESS AMERICAN RIVER OMBRE RASPBERRY SUNDAE ALL SIZES Special color blending technique to create a beautiful Palette of Rainbow Colors Doggie Design is the ONLY company that makes this Step in Mesh Choke Free Design in reinforced large dog sizes, up to size XXXL (approx 90 Lbs.) Certified Break Strength Tested to 386 Lbs, by an International Independent Testing Laboratory. US Patent Number US8418658 B1 DIMENSIONS Medium Chest: 16&quot;-19&quot; (Most Important) Pets Weighing: 11lbs.-16lbs.IMPORTANT: Measure the CHEST, just behind the front legs. The harness needs to fit snugly to work correctly