"He realized much too late that it wasn’t a statue at all, the pedestal standing empty when he looked back over his shoulder." -Trevor Henderson
The creature appears to be at least 5 ft wearing with what looks like a ripped dress. In the picture, the Not A Statue has one arm sticking out while the other one is by its side. Its head is tilted and body is bent. Its face is not seen. The body seems to be skinny. From the quote we see above, the Not A Statue seems to be extremely fast.