A universal trim kit for tubs or showers and a variety of different OEM valves is disclosed that includes an escutcheon in the form of a decorative outer ring in combination with a plurality of interchangeable inserts and at least two fasteners, typically screws, for releasably attaching the escutcheon and one of the inserts to a valve body. The escutcheon further comprises a generally circular, centrally disposed aperture surrounded by an annular flange that functions as a seating surface for any of a plurality of interchangeable inserts, each insert being attachable to the outer ring and to a valve body disposed behind the ring, each insert also having a differently sized or shaped aperture configured for attachment to the body of a particular OEM valve.