Belly Bands are an aid for males that "forget" to not go potty in the house.  They wrap around his waist to safeguard his surroundings.  Simply press a sanitary napkin to the Belly Band before you velcro it in place.  Throw in the washer and dryer as needed.  Can be made either wider or more narrow to fit your boy.  To measure your boy, take a string and wrap it end to end around his waist.  Then measure the string.