A furniture part assembly, comprising: a sidewall provided with a mounting feature; a covering member; and a fitting detachably mounted to the mounting feature such that the fitting is located on the sidewall; wherein the covering member is configured to be detachably mounted on, and thereby cover, the mounting feature of the sidewall after the fitting is detached from the mounting feature; wherein the sidewall includes a bottom portion and a top portion, the top portion has a first predetermined height with respect to the bottom portion, and the top portion is provided with the mounting feature; and wherein the fitting includes a bottom portion and a top portion, the bottom portion of the fitting is configured to be mounted to the mounting feature of the sidewall after the covering member is detached from the mounting feature, in order for the fitting to be stacked on the sidewall, and for the top portion of the fitting to have a second predetermined height with respect to the bottom portion of the sidewall, the second predetermined height being greater than the first predetermined height; wherein the mounting feature is an aperture, the bottom portion of the fitting is provided with a first mounting portion and a second mounting portion, and the first mounting portion and the second mounting portion are configured to be mounted on a first inner wall and a second inner wall of the aperture respectively; wherein the fitting has a rear portion, a first supporting feature is provided adjacent to the rear portion of the fitting, and the sidewall is provided with a second supporting feature configured to support, and be supported by, the first supporting feature; wherein the furniture part assembly further comprises a second panel, wherein the second panel is provided with a first engaging structure, characterized in that a second engaging structure is provided adjacent to the rear portion of the fitting and is configured to engage with the first engaging structure and thereby connect the fitting and the second panel in a detachable manner. a sidewall provided with a mounting feature; a covering member; and a fitting detachably mounted to the mounting feature such that the fitting is located on the sidewall; wherein the covering member is configured to be detachably mounted on, and thereby cover, the mounting feature of the sidewall after the fitting is detached from the mounting feature; wherein the sidewall includes a bottom portion and a top portion, the top portion has a first predetermined height with respect to the bottom portion, and the top portion is provided with the mounting feature; and wherein the fitting includes a bottom portion and a top portion, the bottom portion of the fitting is configured to be mounted to the mounting feature of the sidewall after the covering member is detached from the mounting feature, in order for the fitting to be stacked on the sidewall, and for the top portion of the fitting to have a second predetermined height with respect to the bottom portion of the sidewall, the second predetermined height being greater than the first predetermined height; wherein the mounting feature is an aperture, the bottom portion of the fitting is provided with a first mounting portion and a second mounting portion, and the first mounting portion and the second mounting portion are configured to be mounted on a first inner wall and a second inner wall of the aperture respectively; wherein the fitting has a rear portion, a first supporting feature is provided adjacent to the rear portion of the fitting, and the sidewall is provided with a second supporting feature configured to support, and be supported by, the first supporting feature; wherein the furniture part assembly further comprises a second panel, wherein the second panel is provided with a first engaging structure, characterized in that a second engaging structure is provided adjacent to the rear portion of the fitting and is configured to engage with the first engaging structure and thereby connect the fitting and the second panel in a detachable manner.