These straight panels sit on the units and are non-flexible with an aluminium profile in top and bottom of panel. 

Width: 35 7/16"
Height: 86 5/8" or 114 3/16"
Depth: 15 3/4" (also available in 10 1/4 cm using a half feet)

Stand-alone: Can also be used stand alone as a banner stand type of product. Single or double-sided.
Straight configurations: Several units can be conncted to create a straight wall. 

Flexible panels with rubber profiles in top and bottom of the panel. Used in between straight panels with units, to create corners and curved shapes. Flexible panels cannot be connected to each other or be used at the ends of a configuration. 

Width: 23 5/8" (used for tight corners)
Height: 86 5/8" or 114 3/16"

Can be used at the ends of your configuration for a three-dimensional look.

Width: 4" 
Height: 86 5/8" or 114 3/16"

There is also an end panel used for double-sided units, it is shaped like a wedge (top 4", bottom 5 5/16").