A two piece ostomy appliance is described having: a pouch (12) for receipt of waste a pouch flange (14) connected to the pouch, the pouch flange having an opening (18) communicating with an interior of the pouch and a bodyside flange (20) with an opening (24) and a hydrocolloid layer (22) for securing the bodyside flange to a body of a user around their stoma, the bodyside flange including a location projection (40) which is receivable in a recess in a part of the pouch flange to align the opening of the pouch flange relative to the opening of the bodyside flange wherein a surface of the pouch flange which in use faces the bodyside flange includes an adhesive for adhering the pouch flange to the bodyside flange, characterised in that the recess is positioned at a periphery of the pouch flange and extends outwardly away from the opening communicating with an interior of the pouch.
