I hiked up there today and took all those pictures of it on facebook. It's decently sizable, I'm 6'3" and it towered over me. I'm guessing it's prob 10-12ft from the top to grass. I tried to take pics where you could compare it to the lift etc.
Once snow flies it'll get smaller and they'll fill in the uphill side with snow. Also, as mentioned before, Gaitor is planning on attaching a log on the skiers left side that you can ride off of or slide off into the air.
I can't tell you what kind of signage the park crew is planning on using, because i honestly don't know. This could def end up as a gaper killer (what a shame) so they'll do something about it.