We used to buy real trees too years ago and our cats would climb them too! They ALWAYS insisted on going to the top though! Ornaments would topple off and then the cats would yowl because they couldn't get down. Cat tree toppers...hmmm lol
I had one, Alacer, that was HUGE My friends would always joke he was a dog ...didn't help he prefered to drink out of the toilet o.O
He came from a liter of just 2 kittens, they were both the same smallness born. Thier mother was a small one, aruound 7-8 lbs. One son reached 15 lbs, but his brother Alacer reached 25!
When I told people online his weight they would freak out without ever seeing him, saying he's too fat and I need to put him on a diet so he wouldn't be obese ...then I would show them 2 pics (sorry since lost 'em) of Alacer. He looked like an average housecat sitting by himself.
The second one showed him on his hindlegs with his front paws streached up my front ...where he could reach above my waistline. His spine alone was same length as the bone in my forearm, 11 inches, tail same length. From nose to tip of tip he was about 26 inches long but add in those legs!
With his legs streched out, he could reach 34-36 inches. Like I said he was a Big Cat. (nearly size of some!)