In this study, we have fabricated an RFID tag antenna of the sewing type, and not the embroidery type. In addition, we have measured its impedance, return loss, and reading range. The sewing patterns of two different densities are fabricated, and the properties of the RFID tag antenna have been measured. The measurement results show that the two-layer sewing pattern RFID tag antennas are better than the one-layer sewing pattern antennas. Upon comparison, with regard to the effect of the sewing density, it is found that a lower density is a better property. The maximum reading ranges are 70, 49, 84, and 85 cm, which are sufficiently long.