What is Proximity radius?

The proximity radius is the distance from an anchor address (typically a completed job site) to its Nth-nearest mailable home — for a standard 100-home campaign, the distance to the 100th-nearest neighbor. It is the unit of measurement of Proximity Mail Marketing. The first national measurement (2026) puts the U.S. per-city median 100-home radius at roughly 187 meters (~614 feet).