This multi-part model by Lost Kingdom Miniatures is designed to fit on either a 20mm round base, or 20x20mm square base.
 
We do a decent removal of all of the supports from the printing process that we can without spending too much time, but we recommend you doing your own inspection of the models for anything that we missed.
 
We do not provide bases with any any of our prints, unless a full decorative base is part of the print.