A larger version of the Arch Top Reliquary - Triptych (also shown below with the smaller version for a size comparison). Use them separately or hinge them together (with paper tape, metal hinges, etc.) to make into one wider group.
These panels are 8" tall and a bit over 4-1/4" wide.
Set of 6 pieces (3 solid backs and 3 front panels with open centers).
Design Team Member Laura Carson made a Pretty in Red Triptych (see the wide photo below). More info in the blog and/or see the supply list.