Plywood screw on volume.
Our volumes are made from 18mm plywood and have a textured coating on them.
This volume has 20 T nut placements on it. 5 on each side. You fix them to your wall with wood screws. Break up a boring flat wall with a couple of these.
the based of the the pyramid is 50cm x 50cm, it sticks out of the wall by 20cm
or 1'6"wide by 9" tall