The 5e Player's Handbook gives us the following height ranges for demihumans: Dwarf, 4-5 ft.; Elf, under 5-over 6 ft.; Halfling: 3 ft.; Gnome: 3-4 ft. Here's a few images illustrating what those heights actual mean.
In the halfling and gnome range is homo florensis. The skeleton discovered was a bit over 3.5 ft.
In the dwarf and short elf height range are the Pygmy peoples of Central Africa. Height for males is under 4'11". I imagine dwarves are built less like pygmies and more like Neanderthals, though.
1 hour ago