It is an Eizo EV3285. The resolution is 3840 x 2160, The size of the screen is 697 mm x 392 mm. Thus, it has 140 dpi.
xdpyinfo | grep -B2 resolution returns:
screen #0:
dimensions: 3840x2160 pixels (677x381 millimeters)
resolution: 144x144 dots per inch
Size and resolution are wrong.
The relevant portion of xrandr -q is:
Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 16384 x 16384
DisplayPort-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 698mm x 393 mm
Here, only the size if off by 1 mm in each dimension.
I added a file /etc/X11/xorg.conf.d/90-monitor.conf to fix the dpi that reads: