In this paper, we present the characterization of the reading volume for a chipless RFID system. S21-parameter measurements were done in real environment with a fixed antenna and moving tag inside a 30×30×30 cm 3 volume, the result obtained is the reading zone for the given setup. A qualitative analysis is done, pointing out its resemblance to the radiation pattern of the antenna and the implications on the tag's readability in a 3-dimensional range. In this study, we have shown that the maximum reading distance could be as high as 30 cm, and that the largest reading area is approximately 300 cm 2 with a read success rate of 40% inside that area, for a distance of 15 cm.