At work, I've been rewiring desks following some office expansions and moves. Each desk needed two ports and during the desk moves, the keystone plates went missing so I took one, measured every bit of it, and came kind of close. The dimensions are right, but the keystone holders are a bit thick and not as close together as the original (third and fourth photos show the 3D print versus the original).

These came off a Hon brand desk and original sported Leviton brand keystones and it seems the plate itself is Leviton brand. Consider this the cheap knockoff.

Work uses ICC brand keystones and I can confirm that both the HD and EZ style keystones fit including two EZ keystones (without making you look it up, EZ style is all eight wires lined up side by side in a row while the HD style is the typical one you might see for patch panels that has slots for 4 wires on top and 4 below.

Keystones snap in tight (and can be removed easily with a thin blade or flathead screwdriver) and the plate itself snapped into the desk.

Model was printed in Printbed Black PLA. If you are interested in picking up some Printbed filaments, please feel free to use my affiliate link.