The vest shape keeps the harness comfortable with out putting stress on your small pup’s delicate neck, and it works with a variety of dog body shapes because of its flexible materials and adjustable chest loop. This design is particularly good if your canine is an escape artist and might slip one leg out from beneath a nylon harness strap and hightail it three blocks in a flash. But because the Puppia harness has no give in the neck space, finding a proper match may be difficult. This harness is offered in sizes for canines weighing from 5 to one hundred ten pounds or with chest measurements from 12 to 44 inches. But most dog trainers note that any collar or harness ought to be a tool for dog owners, not a magic solution.