Dog Diapers Large: best for larger dogs with waist size 17" to 23.2". Please measure your dog's waist right in front of the back legs to ensure a good fit. NOTE: Don't too tight when measuring. If your dog is in between sizes, factor in their weight. A heavier dog, go up a size. A skinnier dog, go down a size Highly Absorbent: built with multiple absorbent polyester mesh inner layers and waterproof outer layer to prevent leaks and damage to rugs, carpets, upholstered chairs and sofas Soft and Comfortable: made of soft and comfy material to increase the acceptance, making sure your dog walks comfortably while wearing the diapers; Useful for untrained puppies, female dogs in heat or physiological period, and dogs that suffer from excitement urination or incontinence Adjustable Waistband: built with convenient hook-and-loop closure on the waistband, easy to adjust the length to fit your dog’s waist Washable and Reusable: more economical and environmentally friendly than the disposable dog diapers; Machine Washable and dryable Avont Washable Female Dog Diapers is designed for untrained puppies, female dogs in heat, and dogs that suffer from excitement urination or incontinence.