  We have analyzed the size distribution of voids in 2D slices of the Las
Campanas Redshift Survey (LCRS). The characteristic sizes show a scaling $D =
D_0 + \nu\lambda$ with the mean galaxy separation $\lambda$. Comparison with
mock samples of the LCRS in 2D and 3D, using various simulations, cosmologies
and galaxy identification schemes, gives a similar scaling, but with steeper
slope and a lack of large voids. Best results are obtained for dark matter
halos in a $\Lambda$CDM model.
