These models are not officially related to Dungeons and Dragons, Warhammer, or any other miniatures Game. While many of the products I produce make great stand-ins, proxies, or kitbashing projects in a number of well established table top games, they are not affiliated with any one of them.
A note on size selection - Lord of the Print miniatures specifically have a tendency to be extremely large in comparison to the scenic bases incorporated to their design. Many of them have wings, tails, horns, etc. that overhang the bases and can negatively impact in-game rules interactions for line of site, cover, and movement. If you want to use them as proxies for wargames where these factors are important then I recommend that you purchase the model 30-40mm smaller than the game appropriate base you intend to place them on. Feel free to message me if you have concerns or want advice on this matter.