[header] How to put on a puppy harness [title] Purchase an overhead harness. [step] An overhead harness fits over your dog's head and has straps or tabs that adjust to fit around her belly. Some overhead harnesses also come with chest protection to prevent rubbing and added safety features like reflective trim and a car seat restraint loop. 
[substeps] Look online for an overhead harness, or at your local pet store. You will need to measure your pup's girth or belly area and her neck area to determine her size.