Siberian fir, Abies sibirica, grows 30–35 m tall with a trunk diameter of 0.5–1 m at breast height and a conical crown. The bark is grey-green to grey-brown and smooth with resin blisters typical of most firs. Shoots are yellow-grey, resinous, and slightly pubescent. The leaves are needle-like, 2–3 cm long and 1.5 mm broad on average. They are light green above with two grey-white stomatal bands underneath, and are directed upwards along the stem. They are soft, flattened, and strongly aromatic. The cones are cylindrical, 5–9.5 cm long and 2.5–3.5 cm broad, with small bracts hidden by the scales. They ripen from bluish to brown or dark brown in mid-autumn. The seeds, 7 mm long with a triangular wing 0.7–1.3 cm long, are released when the cone disintegrates after maturity.