No Choke Dog Harnesses for Small Dogs – Gooby’s Comfort X Harness is made for small breed dogs. This means that our largest size will fit a dog up to 30 lbs. In order to fully utilize the functionality of the harness, as well as the fit, we recommend measuring the largest part of the dog’s chest and follow the chest sizing. For reference, estimated sizing by weight is Small: 5-9 lbs Medium: 9-15 lbs Large: 15-20 lbs X-Large: 20-30 lbs. PATENTED CHOKE FREE X FRAME - Comfort X Harness is made with a patented choke free design with chest strap creating a X. Our no choke dog harness sits below the usual neck area, reducing the stress pressed on the neck. By placing the D ring on the back, pull trajectory is lowered, reducing the chance of harness being pulled up to choke the dog (US D823,556 S/ US D850,021 S). Lightweight Mesh – Polyester soft mesh no pull harness for medium dogs and small dogs keeps the body temperature cool. It is also very light in weight and easy to take care of (just machine wash cold and air dry) ideal for an everyday use for your no pull dog harness. Leash Attachment - High quality metal d-ring for extra security to withstand the test of time. [Note: When choosing the correct size, we recommend measuring the largest part of the dog's chest and follow the chest sizing first and foremost. If between sizes, please size up] Machine Washable - 100 % polyester mesh material allows for easy cleaning and quick air dry, saving you time and hassle.