Just to be clear, what is the definition here for a full polyhedral set?

Some include 2 d20s.  Some don't include the second half of the d100.  Some include a d3, d18, d24, etc.  

The common core of d4, d6, d8, d10, d12, d20 seems standard, but often a "full set" is sold including something else.  

strictly speaking i own like one set of polyhedral dice i never use so i'm honestly a little fuzzy as to which ones are in the set, but it should have a use for a d4, d6, d8, d10, d12, and d20 (d100 optional).

but also shhhh i'm not going to check that hard as long as it's in the spirit of providing a use for fancy sets of dice