This model is a 40 x 40 x 200 mm tower that will help you visualize the quality of your layers in the Z axis.   

There are raised letters at the base to show the X and Y axis.

It is easy to resize in your slicer if you need it shorter or longer.

Print this in vase mode with a couple of bottom layers.  A brim is not necessary, but it may help if you are printing a tall one.