Having been inspired by my recent purchase of Oathmark and the release of Frostgrave II (though that is a story for another day), I put in an order to North Star for a quantity of Oathmark and Frostgrave goodies (plus lots of bases).
Renedra have two sets of "sabot" bases for 25mm round figure bases, one of two ranks (ten figures) and one of four ranks (twenty figures)
You get two sprues (four sabot bases) per pack.
Even the Gnolls (probably the most unruly of the Frostgrave figures) sit nicely in the sabot base (even if the "officer" is slightly out of position on the overhead view).