A corner siding product may include a plurality of panels. Each panel may include a front face with a simulated pattern, a hollow back, a longitudinal length extending in an x-direction, a lateral width extending in a y-direction, and a depth extending in a z-direction. In addition, the corner siding product may include a living hinge extending in the y-direction between the panels along side edges thereof. The corner siding product can have an uninstalled configuration wherein it is substantially planar. Embodiments of the corner siding product also can have an installed configuration wherein the living hinge permits the panels to be non-planar relative to each other, such that they are complementary in shape to a corner of a building.