>>365820903
Thank you for the response. Before I went to bed I found an image of someone else's from above, and since I have a Quest 2 and know it's width I was able to do some fuckery in paint.net to try and work out the width of the DAS, which came out to 25.8cm before accounting for lens distortion which would reduce the number somewhat. So that lines up with what I found.
It really helps to have a more real world measurement from you, again thanks. I'm going to get the case I was looking at, the Lykus HC-3820.