In precision analog circuits, active device area is often determined by matching requirements. The matching behavior of integrated components improves with enlarging their active area. In order to limit the mismatch-induced error of a given parameter (e.g. output signal) of a complex circuit, the areas of all components have to be chosen properly according to their individual contribution to the total output signal error.Based on a fully analytical approach, in this paper a universal solution for the optimum area distribution is derived. The method represents an efficient alternative to time consuming numerical Monte-Carlo simulations. Moreover, it allows estimating total chip areas required to guarantee matching performance with a high precision. Applying this method to basic analog CMOS sub-circuits shows examples.