<p>To investigate the impact of size and shape on the dielectric constant of semiconductor nanoparticles, a straightforward theoretical model is created. It has been discovered that the dielectric constant rises with size, depending on the shape under consideration. The acquired results are contrasted with those based on older models as well as with experimental data that is currently accessible. Different models foresee differences with similar trends. But never before has a basic model shown such great agreement with experimental data, especially in the low size range. In comparison to past research, the model has fewer input parameters and more forms. This highlights the ease of use and broad applicability of the current model, which allows for the analysis of the size and shape dependence of dielectric constant of different semiconductor nanomaterials of current interest in science and technology.</p>