The white spruce is a large evergreen
which grows normally to 70 feet tall and usually 15 to 20 feet wide. The bark
is thin and scaly, flaking off in small circular plates 5 to 10 cm (2 to 3.9 in) across. The crown is narrow conic in young trees, becoming cylindric in older trees. The shoots are pale buff-brown, glabrous (hairless) in the east of the range, but often pubescent in the west, and with prominent pulvini. The leaves
are needle-like, .5 to 1 in long, rhombic in cross-section, glaucous blue-green above with several thin lines of stomata, and blue-white below with two broad bands of stomata.