The included Zip File contains 4 STL files that will allow you to 3D Print each of the pieces separately.  
 
This Coaster Set comes with three coaster designs - Lion Head, VW Van, and Weed Leaf.  The holder can have up to 5/6 coasters. As you can see in the photo, the sixth coaster sits right above the lip.
 
I print sets of six with 2 of each design; but if you want each coaster to be unique, look for additional designs sold separately.
 
The coasters are each 3.6in outer diameter.
 
The coaster holder has four shapes cut into the side for coaster removal.
 
I strongly suggest printing with Amolen 30% Wood Filament.  It looks great and has an better feel to it.