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New reverberation mapping measurements of the size of the optical ironemission-line region in quasars are provided, and a tentative size-luminosityrelation for this component is reported. Combined with lag measurements inlow-luminosity sources, the results imply an emission-region size that iscomparable to and at most twice that of the H$\beta$ line, and is characterizedby a similar luminosity dependence. This suggests that the physics underlyingthe formation of the optical iron blends in quasars may be similar to that ofother broad emission lines.

A Tentative Size-Luminosity Relation for the Iron Emission-Line Region in Quasars