Yes, this mini is on scale (28 mm scale, actually).
It is a little smaller than an actual Beholder might look, because it is undead, and just a skull. The Beholders' flesh would add some circumference, I believe.
I used kneadtite epoxy (plumbers' putty) to sculpt this miniature over a wire frame. (copper wire)
The eyestalks were sculpted seperately, and then "plugged in" later.
The teeth were perhaps the hardest part, as each one eneeded a wire support under it. Very fiddly work, that.
Kengar, that's a neat Roper.
Thanks for the feedback, everyone.