An adhesive flange extender for an ostomy flange comprises a flexible arcuate membrane having a radial inner edge, a radial outer edge, and an adhesive surface for securing the membrane simultaneously to the skin of an ostomate and to an ostomy flange. The membrane includes at least two independently movable tab portions at the radial outer edge of the membrane. The membrane further includes a central region and a border region that is thinner than the central region to provide increased flexibility at the periphery of the flange extender.