***If you are between sizes, please opt for the smaller size to ensure a firm fit.*** Instructions on how to Care For Your Adult Swim Diaper: After use: 1. Rinse well 2. Warm machine wash, using only non-chlorine bleach 3. Line dry Sizing: Adult Small fits 20"-26" waist Adult Medium Fits 26"-34" waist Adult Large Fits 34"-42" Waist Adult XL Fits 42"-52" Waist Adult XXL Fits 52"-60"