| aa || metre
|-
| ab = || Imperial foot
| ac = || saszhen
| ad = || klafter
| ae = || fathom
| af = || Dutch foot
| ag = || Prussian foot
| ah = || Austrian foot
| ai = || Spanish foot
| aj = || Bavarian foot
|| ak = French foot (metric)
| al = || French foot (imperial)
| am = || Roman palm
| an = || Portuguese palm
| ao = || South African foot
| ap = || Danish foot
| aq = || Norwegian foot
| ar = || Swedish foot
| uu = || unknown unit of measurement
| zz = || other known unit of measurement
|}