Siege of Orgrimmar. Largest instance in the game?

[Zhulrak]

Was looking at some SoO videos and at some of the bosses, and I was wondering if SoO is the largest instance? I know Ulduar and Throne of Thunder are pretty damn big but if you count all the different floors and zones etc. does SoO take the cake?

[Deleted]

I haven't seen the entire instance, but just looking at the first room, then the map to see how many additional floors there are... Yes, I'd say SoO is the instance in the game. Bigger than ToT, Ulduar and BRD.

[Ginantonicus]

I would think BRD was bigger back in its day.

[LazarusLong]

I would think BRD was bigger back in its day.

AQ40 was the biggest in old days

[arcaneshot]

AQ40 was the biggest in old days

The irony of AQ40's size was that it was a big giant circle. The final boss chamber was near the entrance.