Dog and Cat Diaper For SMALL Breeds. PLEASE measure you pet! 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 of pad you need for your dog. Please understand that there is no standard sizing system for pet clothing. 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 XS can very well be another brand size XL! Each listing has its own unique chart and no two listing charts are the same. If you are between two sizes or your dog has long hair, order the next size larger.