Planar Xscreen M100 dimensions etc.
Overall width: 2.429,0mm (95,63")
Overall height: 1.389,2mm (54,34")
Overall depth: 97,9mm (3,85")
Screen dimensions: 2.210,0 (87,01") x 1.265,0mm (49,80")
Screen diagonal: 2.550,7mm (100,42")
Effective screen dimensions:2.160,0 (85,38") x 1.215,0mm (47,83")
Effective screen diagonal: 2.489,4mm (98,01")

See technical drawing here.