Abstract: A kit for constructing a stackable column, the kit including at least four pre-fabricated interlocking members. Each interlocking member also includes a lower segment wall and an upper segment wall. The lower segment wall extends in a first direction as well as a second direction perpendicular to the first direction. The upper and lower segments each have at least three edges with locking features for engagement with an adjacent interlocking member. The plurality of interlocking members surround and are secured to a post with a brick tie. The interlocking members include features on the at least three edges for locking engagement with an adjacent interlocking member.