Do you have a source for that? Linsoul says this about the MK2:
Nozzle Size(stem)
5.4mm
Nozzle Size (lip)
6mm
Variations is 6.45mm
EDIT: Ok, the shell is significantly bigger: đŸ”¶ Thieaudio Monarch II - #13 by igor0203
But with the Moondrops the nozzle was borderline… but then to be fair: I remember that the faceplate of the Blessing 2 was the deceiptively small. I think the Variations has the same size faceplate. The actual body of the Variations is bigger than that picture makes you believe, I think. I can’t say anything about the Monarch MKII