Oculus founder Palmer Luckey says Rift S is only suitable for about 70 percent of the population

The Oculus Rift CV1 offered mechanical IPD adjustment with a supported range of about 58mm to 72mm. IPD is interpupillary distance, or the distance between your eyes. Having the IPD at the correct distance helps match the field curvature on the focal plane, corrects geometric distortion, ensures proper world scaling...