Nuclear Magnetic Resonance Gyroscopes (NMRGs) exhibit significant potential for miniaturization and high-precision, positioning them as a critical technology path for next-generation micro-gyroscopes. To support the development of micro?NMRGs, this study fabricated a fully glass?based Rb–Xe vapor cell with an internal dimension of 1 mm×1 mm×1 mm via optical bonding, and systematically measured key parameters of the nuclear spin ensemble. Results at 130 ℃ showed longitudinal relaxation time (T1), transverse relaxation time (T2), and polarization fields were 7.382 s, 3.316 s, and 11.382 nT for 129Xe, respectively, and those for 131Xe were 15.381 s, 9.029 s, and 20.344 nT, respectively. These parameters as a function of temperature in the range of 115 ℃-140 ℃ were also obtained. Based on the measured parameters, the angular random walk (ARW) for the NMRG employing this cell is estimated to be 0.17?°/√h. A key challenge remains further increasing the relaxation times. This research on miniature vapor cell provides a foundational basis for advancing micro-NMRGs development.