A sealing station for a packaging machine, in particular for food products, for closing packages by joining package components (23, 25, 77) by applying heat and pressure, in particular by sealing or welding, wherein the packages each comprise a product region containing a packaged product and a marginal region extending next to the product region, in particular around the product region, said sealing station comprising an upper part and a lower part, which are arranged at opposite sides of a, preferably horizontal, sealing plane, which bound at least one chamber provided for receiving at least one package and which are movable relative to one another perpendicular to the sealing plane for opening and closing the chamber, wherein the upper part comprises a heatable sealing tool and the lower part comprises a counter tool, said sealing tool and counter tool bounding a receiving space located within the chamber for a respective package, wherein, when the chamber is closed, the sealing tool and the counter tool can be pressed against one another while interposing a marginal region of a respective package to be acted on, wherein the receiving space comprises a packaging space disposed at least partly above the sealing plane for the product region of a respective package, wherein a plurality of separate fitting inserts are provided, and wherein the packaging space can be adapted to the product region of a respective package in terms of size and/or shape by inserting a number n ≥ 0 of the fitting inserts into the receiving space, characterized in that at least some fitting inserts or all fitting inserts are plate-shaped, or in that at least some fitting inserts or all fitting inserts are each concave at their lower sides facing the sealing plane in the inserted state. wherein the packages each comprise a product region containing a packaged product and a marginal region extending next to the product region, in particular around the product region, said sealing station comprising an upper part and a lower part, which are arranged at opposite sides of a, preferably horizontal, sealing plane, which bound at least one chamber provided for receiving at least one package and which are movable relative to one another perpendicular to the sealing plane for opening and closing the chamber, wherein the upper part comprises a heatable sealing tool and the lower part comprises a counter tool, said sealing tool and counter tool bounding a receiving space located within the chamber for a respective package, wherein, when the chamber is closed, the sealing tool and the counter tool can be pressed against one another while interposing a marginal region of a respective package to be acted on, wherein the receiving space comprises a packaging space disposed at least partly above the sealing plane for the product region of a respective package, wherein a plurality of separate fitting inserts are provided, and wherein the packaging space can be adapted to the product region of a respective package in terms of size and/or shape by inserting a number n ≥ 0 of the fitting inserts into the receiving space, characterized in that at least some fitting inserts or all fitting inserts are plate-shaped, or in that at least some fitting inserts or all fitting inserts are each concave at their lower sides facing the sealing plane in the inserted state.