Hi there. The Mouslings from Reaper are rather small and rotund (on purpose). Their Legion of Justice and Cake minis fit right in with all of our critters. Our critters vary in size to make them pop more and give variety. But they are all designed to fit in together. I imagine they would fit right in with the Mice and Mystics Board Game minis, but cannot say for sure as I do not have the game. Thanks! Jim www.DarkSwordMiniatures.com