The pieces are small, but they do print. Print at as fine of detail as you can and slower the better. They will nest in the holes on the base. Have fun! Scale everything up to 1.6 if you want a set that fits full size dominoes. The basic set fits small casual dominoes
UPDATE 12102017: Uploaded new pieces and a slightly adjusted base. Some of the previous pieces were not really easily printable, and as a result have been swapped out.