A size comparison between some of the more regular characters in the Aurasian Thicket.

Left to right:
Alfyn, Meikkiel, Narleheim, Bo'robeir, Robber

Bottom to top:
Alfyn: cat form, human form
Meikkiel: start of Rebirth, end of Rebirth, start of Hunting, end of Hunting
Narleheim: end of Hunting, start of Hunting
Bo'robeir: end of Grudge, beginning of Valley, beginning of Grudge, timeskip after Valley
Robber: end of Civilization, mid civilization