Size L may fit a dog with 13' - 18' neck girth. Width is 1', weight is about 100 grams. INSTRUCTION: Measure your dog's neck with a soft measuring tape to choose correct size. Collar size is adjusted by screws that come with each collar. You will need a flat head screwdriver to adjust this collar to the desired size. Genuine leather dog collar with metal side release buckle. Our colorful dog collars and puppy collars is a perfect combination of style, high quality and comfort. These leather collars for adult dogs as well as puppies are comfortable, pliable, light and elegant. These durable dog collars and collars for puppies are handmade strong, heavy duty, and have great plane design. Our leather collars for dogs are perfect for daily use. Adjustable collars for dogs are pet safe. Browse our store for other matching products.