Easy to print monitor riser. The bottom is approximately 6.7 inches wide by 13 inches long and the top  5.2 inches wide by 13 inches long. It is approximately 2.5 inches tall. 

No supports are needed to print this model. 

There is a “support post” in the middle of the riser between the top plate and bottom plate to make sure the weight of the monitor does not bend the top plate. 

To assemble, simply snap the dovetail joints into place and slide the support piece into the middle indentations.