this is very old art for this old req (this art is created at march lol, (only oj and paper was finished, soap was just now drawn) and i just now finished it) ((and yes, this old art is for this req specifically lol so yeah, just thought id share that info lol))
according to some random website i pulled up, a story is generally 10 feet tall.
counting the number of window rows, hotel oj has 8 floors. ignoring the wild difference between the windows at the top and bottom to the rest, this would mean hotel oj is 80 feet tall. hotel oj appears to be 5 and 2/3rds OJ tall. assuming it's actually 6 OJs due to perspective, this means oj is 13'4.
terrifying.
however, it should be noted that in waffling about, hotel oj appears to have 6 stories, counting the window rows and the doors (which don't have windows on the side of them).
assuming this is the case, and that the number of OJs tall is 6 (which may not be the case, given that we don't see OJ compared to the hotel here), OJ is actually 10 feet tall, which is slightly less terrifying.