These diapers are reusable. They DO NOT INCLUDE the ABSORBENT pads. * Women"s feminine napkin works perfectly and attach with the adhesive strip. You decide how thick or pad you need for your dog. * Please measure your pet and compare to the chart provided as each brand and style of pet clothing has its own sizing system. One brand size M can very well be another brand size XL! Each listing has its own unique chart and no two listing charts are the same.