Fntastic mod. Nice to finally experience it as the devs intended.
A downloadable mod
In the Doom Bible, Tom Hall implies that Wolfenstein (and thus, presumably, Doom) has a scale of 16 units to 1 real-world foot. Doomguy, whose height is 56 units, is thus three and a half feet tall.
This small mod corrects that egregious error, enlarging Doomguy to a more appropriate six feet (96 units).
Note that, due to bugs in the original games, this will render Doomguy unable to enter a great number of hallways. Consider binding a key to crouch.
Check out what people are saying about it on the idgames archive:
“rofl what the hell”
“What's the point of this if this just bugs the game even more?”
“Tom Hall was implying that Doomguy is 4 years old, I thought that's become common knowledge. Anyway, nice mod.”
Requires GZDoom, or ZDoom, or some other fork or whatever. The effect is very simple, so even ancient versions will probably work.
realprop.pk3 onto (G)ZDoom, or pass it on the command line with