I've seen trees like this, on public land where they definitely weren't curated. They're usually the younger looking pines, 'bout 20ish feet I'd guess. They are going to get bigger, but the biggest they seem to get is about 16" in diameter from what I can tell, and I'd guess oh, 80ft or so. The tree's girth is not a reliable indicator here is what I'm saying, though idk whether this tree specifically was shaped or not, as both the tree's girth and the growing through a hole in a helmet are also totally possible in nature.