SET - 2pcs Cute Pet Dogs Physiological Shorts Braces Pet Cotton Sanitary Panties Diapers Color Random L 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. Size S - waist:13-22cm/5.1"8.7" Back Length:17-28cm/6.7"11" M- waist:14-24cm/5.5" 9.4" Back Length:17-28cm/6.7"11" L - waist:16-26cm/6.3"10.1" Back Length:18-32cm/11"5.1" NOTE: When measured don't be too tight,small dogs appropriate to relax 0.5 ", large dogs relax 0.8" -1.2"