Abstract. This article is about mathematical sets and related measure theory, in particular Jordan's measure. The Jordan measure is simpler than the Lebesgue measure and is used in many mathematical and practical fields. The article covers the basics of the Jordan scale, its mathematical properties and fields of application. Also, examples related to Jordan's scale are analyzed and help to give a perfect understanding to the students. This article is intended for students and mathematicians who are interested in the theory of mathematical measurement, and aims to provide them with a deeper knowledge of Jordan's measurement.