The white spruce is a large coniferous evergreen tree which grows normally to 15 to 30 m (50 to 100 ft) tall, but can grow up to 40 m (130 ft) tall with a trunk diameter of up to 1 m (3.3 ft). The bark is thin and scaly, flaking off in small circular plates 5 to 10 cm (2 to 4 in) across.