A metering element for an inhalation device is provided. The metering element comprises a plurality of openings being configured to receive a substance, wherein at least one of the openings has a different size than at least one other opening. Furthermore, an assembly for an inhalation device is provided. The assembly comprises a metering element with a plurality of openings and a powder channel which comprises an opening, wherein an arrangement of the openings is adapted to the shape of the powder channel such that each opening extends into the opening of the powder channel for a different amount.
