#$%^&*AU2012201338B220130912.pdf#####ABSTRACT A convex barrier ring, that includes a generally oval shaped body and tapered peripheral end portions, is provided. In use, the convex barrier ring is sealed against peristomal skin surfaces such that the tapered peripheral end 5 portions are aligned with folds or creases in the skin surfaces to reduce leakage of stomal effluent. The convex barrier can also have an oval stoma-receiving aperture to provide an improved fit for oval or loop stomas. 10