The size of the total public sector and its comparison with different countries is really not precisely measurable for several reasons you mentioned. Differences in the size of the countries, the structure of their activities, the organization of the state (whether they are unitary or federal states), demographic and geographical characteristics, and different methodologies and definitions of the public and state sectors make such a comparison very complex. Because of these ambiguities and limitations, a direct comparison between countries can serve as an illustration of the general situation, but it is not a firm starting point for drawing absolute conclusions. It is important to consider the context of each country and to analyze more deeply the reasons for the differences in the size of its public sector. In addition, it is important to understand that the size of the public sector can be only one of many factors that influence the economic and social dynamics of a country. In this final paper, the public sector of the Republic of Croatia is observed. At the beginning of the paper, the importance of employment for economic growth and development was generally explained. The term public sector is defined and the methods of measuring the size of the public sector are defined. The index as a concept, what it is used for and its types are explained. The index is explained on several examples. They show us how many units of occurrence in one period come to 100 units of occurrence in another period. The indices of this formula were used for the calculations, and the data were mainly taken from the State Statistics Office (DZS) and the Ministry of Justice and Administration.