face cord is 4 x 8 ft by whatever length. generally assumed to be 16 but not really. could be a face cord of 20 inch, face cord of 24 inch, etc. a raditional term but not a legal nor standardized one.
Most of the CL ads here list 'oak at 125/cord' when they actually selling 4 x 8 x 16 inches for 125, i.e. 1/3 cord....... most buyers think a cord is that. and they still get shorted..... or sold 4x8 cris-cross stacked.