Abstract: A hearing aid includes a faceplate (2) and a matching adaptor plate (4) below it. These plates are held in together by fasteners such as clips or screws (12). The faceplate and adaptor plate are custom cut and trimmed to seamless match a custom shell (9). Only the adaptor plate (4) is glued to the shell (9). A boundary (5b) between the faceplate (2) and the adaptor (4) is not visible on the hearing aid when worn by a user. Furthermore, the position of boundary B enables a reduction in the visible surface area of the faceplate (2) to be achieved.