The 'standard' 13 hole base has a few variations. This one is a little bit heavier in weight and slightly taller. You can see a comparison shot of it to the normal one in the second picture. I don't know if a certain Nendoroid manufacturer makes this style or if it's totally random as a few Nendoroids have them, but most don't. If you're interested in something a little bit more weighty and slightly taller this is the base for you.
This is ONLY the base.