Kundarak Vaults (Patreon)

The Gauntlet is [30x40]

Sublevels 1 & 2 are [50x50]

Sublevel 3 is [40x40]

Sublevel 4, Deep Vaults is [40x40]

Deepest Vault (Boss room) is [30x30]

For a vault heist set in my Eberron Game. 

I'd recommend making a random loot/security measure table! There could be anything in these vaults, or anything protecting them.