XS is suitable for waist circumference: 25-35cm, suitable for small dogs. S is suitable for waist circumference: 30-40cm, suitable for small and medium dogs. M is suitable for waist circumference: 40-50cm, suitable for medium-sized dogs. L is suitable for waist circumference: 50-60cm, suitable for large dogs. XL is suitable for waist circumference: 60-70cm, suitable for large dogs. While measuring, not to wrap the measuring tape too tight. If your dog has thick hair, please count the hair's thickness into measurement. If your dog's waist size is between two sizes, please choose larger size doggie diaper. [Highly Absorbent & Leak-proof]: Our washable dog diapers are more comfortable and stylish. Each reusable dog diapers with 3 pretty patterns.Period diapers for dog are made of premium materials. Sewn-in super absorbent pad, bird-eye mesh fabric against skin and a leak-free exterior pull shell to keep off leaking and possible damage to carpets, sofas, car and so on. [Diapers Skirt for Female Dogs]: The pet diapers used for untrained puppies, female dogs in heat, and dogs that suffer from excitement urination or incontinence. And they are available in a variety of eye-catching designs so your girl will become the focus in the crowd. [Easy to Use]: The female puppy diapers are easy to put on and take off, also allows pets to move freely while being beautiful. The hook & loop closures are easy to adjust the dogs waist, provide a comfortable fit around the waist. [Washable and Reusable] - These cute ruffled doggie diapers are easy to clean and can be washed more than 300 times. The washable puppy diapers for girls are more friendly to our planet than the disposable doggy diapers.