This page contains specific information about coast Douglas-fir (Pseudotsuga menziesii) '3921', which can be found on the estate Rhederoord in De Steeg (municipality of Rheden). The girth of the tree, measured at a height of , is 2.65 m 1.30 m (Mar 6, 2011, Jeroen Philippona). Its height is exactly 41.80 m (Mar 6, 2011, laser with Sine method (e.g. Nikon Forestry 550 laser rangefinder), Jeroen Philippona). This tree was planted around the year 1920 ± 10, which makes it around 95 ± 10 years old (Jeroen Philippona, Oct 1, 2011).