The approximate size is around 20m/65ft in diameter. Compared to other interiors:
So it's not much smaller than the famously huge TV Movie console room set, while having a lot more vertical space. It really is a strong contender for the biggest TARDIS interior we've ever had.
- The original console room used in 1963 was around 10m long (from the door to the back wall of the fault locator)
- The 1983-1989 set introduced in The Five Doctors was around 8m across
- The TV Movie set used for Paul McGann in 1996 was around 23m at its widest point (the diameter of the outer colonnade – it didn't have true walls for large parts of the set apart from the doors and the library, using drapes and lighting to give it the impression of going on forever into the gloom)
- The Eccleston/Tennant ("Coral") set and Smith/Capaldi ("Toyota") set were each around 12m in diameter
Wasn’t the TVM basically a warehouse they did up and filled as a console room?