A step (Latin: gradus, Latin: gradūs) was a Roman unit of length equal to 2½ Roman feet (Latin: pedes) or ½ Roman pace (Latin: passus). Following its standardization under Agrippa, one step was roughly equivalent to 0.81yd.
The Byzantine pace (Greek, Ancient (to 1453);: βήμα, bḗma) was an adaption of the Roman step, a distance of 2½ Greek feet.
Similarly, the US customary pace is a distance of 2½ feet or .