3d stl files only- see my list of print merchants for printed figures
If you do not have a 3d printer you can buy PHYSICAL PRINTED copies from my merchants around the world listed here- just let them know which of my designs you are interested in as they have access to all of these but only tend to add them to their stores as they are asked for:
Sizes: preference varies WILDLY and so my advise is to open the files and use a measuring device in the program to see if it is the exact size you wish- and then do a single test print. All files can usually be adjusted up or down within 10% (90-110%) without too many issues but if exact sizing matters be sure to test print first. In general the vast majority of stuff here will be very close to 1/48 scale in height. I have printed them all but your experience may vary with the printer you use and its settings.
I also have a Shapeways store- most of the stuff here isnt on there as Shapeways is no longer my preferred print merchant (see list above) but I can put it there if you really want a figure and have no 3d printer of your own- just let me know :) https://www.shapeways.com/shops/millerbros