The present invention provides a reinforcement ring (10) for capsules for obtaining beverages, for example espresso coffee, comprising a side wall (1) and a flat surface, preferably having a uniform thickness (2), protruding from the side wall (1), wherein the side wall (1) and the protruding flat surface (2) are made in a single body and wherein the side wall (1) comprises reduced thickness areas (3), so as to reduce the total amount of material used for the production of the ring. A capsule for obtaining beverages comprising such a reinforcement ring (10) is also provided.