Abstract: A piece of transparent material has a hollow form extending away from a planar surface. The hollow form has a crown section and a bill section, both sections having a common bottom face. The inner dimensions of the crown section correspond to the outer dimensions of the crown when the back half of the crown is folded in back of the front half of the crown. The inner dimensions of the bill section correspond to the outer dimensions of the bill. A baseball style cap fits within the cavity formed by the crown section and the bill section. Backing material contacts the window piece against its rear surface and can be seen through the window piece. A frame holds the window piece, the backing material, and a rigid back piece together. The entire structure is mounted on a vertical surface such as a wall, for displaying the cap. A secondary display area below the hollow form is created by removing some of the backing material.