A siding product may include a panel having a substantially rectangular structure with a simulated pattern on a front face thereof. The panel may be formed from a polymer and may include color variegation. The panel may have a hollow back and be a single shake configuration that does not simulate more than one shake or more than one course of siding. The siding product may include a panel having a front face with a simulated pattern. The panel can include a hollow back, a longitudinal length extending in an x-direction, a lateral width extending in a y-direction, and a transverse depth extending in a z-direction. The panel can have a plurality of reinforcement ribs on the hollow back that extend longitudinally in the x-direction and transversely in the z-direction. In a version, none of the reinforcement ribs extend laterally in the y-direction.