Ethnomathematics is a part of mathematics that bridges the abstraction of mathematical concepts with the contextualization of mathematics in culture or everyday life of society. This study aims to reveal ethnomathematics in the making of kluwung motif woven fabric in Banyuwangi as a mathematics learning material, especially in the elements of geometry and measurement. The study was conducted in a qualitative framework with an ethnographic approach, in Jambesari village, Banyuwangi which is the residence of the only woven fabric maker in Banyuwangi. This confirms that the informant in this study is only one, so data collection was carried out through observation, interviews, and documentation, were validated in the form of time triangulation. Data analysis was conducted qualitatively using the Miles & Huberman method. The research results show that there is ethnomathematics in the kluwung woven fabric motif, namely two-dimensional shapes, three-dimensional shapes, and measurement (length and time). These results support the contextualization of mathematis learning in the elements of geometry and measurement, especially in phases A and B. Furthermore, combinatorics and arithmetic concepts were also discovered. The results can be further developed as materials and media in mathematics learning according to the intended learning outcomes.