What size TV for my bedroom?

Hello reddit, My bedroom isn't small but then again it's not the biggest. I have been saving for a while and have around 3k saved up. I want to buy a new TV as I have a 32 inch which is doing me well but I just want something in 4k and bigger. I was thinking about getting an 85 inch, although I don't know if it would be too much. The one I have in my living room is around 55 inch so do you think it would be going overboard? (I live in my mums house btw so I can't really change anything)