Approximately what scale size marks the threshold where the variance of matter density sharply drops, confirming homogeneity?

Answer

140 Megaparsec

The statistical variance of matter density is expected to drop sharply as the scale crosses the approximately 140 Megaparsec mark, confirming the scale threshold for homogeneity.

Approximately what scale size marks the threshold where the variance of matter density sharply drops, confirming homogeneity?
universeobservationcosmologydirectionisotropy