Excluding the Epic Monsters, all of the monsters in the core game have a 30mm diameter base, allowing the black ring bases to fit snugly around just about any monster which happens to show up in the game. It is very easy to install and remove monster miniatures to and from the ring bases without damaging them. The black ring bases have a slot for wound tokens which make it easy to record monsters’ hit points.
No matter how many monster miniatures you will finally end up receiving, in any one game of Deep Madness there are usually only 6 types of monsters in play and only the monsters on the board will need ring bases. You can buy extra ring bases in the optional buys if you so desire.
Please see the following update for details: