Form factors are often used for stem timber volume estimation at both tree and forest stand levels. But this estimation becomes easy and faster when for each species is established a table where are ordered these factors according to the trees height. This contribution proposes such table for Aleppo pine reforestation realized in 1890 in the region of Tlemcen (West of Algeria). The method used for its establishment uses advantageously the existing relation between natural and artificial (breast-height) factors and requires a limited number sample trees (50 to 80 only). The obtained values, from 0540 to 0356 for respectively 6 to 25 meters heights, express better taper of the stems in the study stand and allow practically quick stem timber volume evaluation in our survey zone or in other similar stations.