This paper provides a better understanding of the variation of growing regions and differences in distance from pith to bark on wood fiber lengths. For this aim, Calabrian pines collected from five different growth regions, namely Kahramanmaras, Burdur, Muğla, İzmir and Balıkesir, were used to determine fiber lengths. In experiment, specimens prepared from logs cross section which is taken from three different distances from pith to bark (r/6, 3r/6 and 5r/6) were evaluated. As a result of analysis, distance from pith in the same area have shown a significant effect on fiber dimensions. In the evaluation among the habitat, it was obtained that r/6 and 3r/6 have a significant effect (p<0.001, p<0.05 respectively) on fiber dimensions, however; 5r/6 has a nonsignificant. The results showed that, the quite suitable habitat in terms of fiber lenghts is Balıkesir which has high sand (64.4%), moderate clay (24.2%) and lime-poor (3.1%) soils. These results will make a positive contribution undoubtedly for the plantations will be established in the future of this species.