Ask a location manager where their customers come from and they will describe a shape: the neighborhoods on this side of the highway, out to the river, not past the mall because that is the other store's turf. Then ask their mail vendor for a target list and they will get a zip code. The mismatch between those two answers is where direct mail budgets leak.
Why zip codes are the wrong unit
Zip codes were designed for mail delivery routes, not for marketing. They vary from a few blocks to several hundred square miles. They cross county lines, cut through neighborhoods, and bear no relationship to drive time. A store on the edge of a large suburban zip can mail 18,000 households, most of whom live closer to a competitor, while missing 4,000 households a mile away who happen to fall in the next zip.
Zips persist because they are convenient. Every list vendor sells by zip, every co-op claim form has a place to write them, and they are easy to approve. In the published manufacturer plans we track, print and direct mail are eligible in 96 to 100 percent of programs in the home, hardware, and garden categories, yet almost none specify how the audience should be drawn. The dealer decides, and the dealer defaults to zips.
Three better shapes
Radius
Every household within a set distance of the store, typically three to ten miles depending on the category. A radius reflects how customers actually think about convenience. A ten-mile ring around a lawn and garden dealer in our example data reaches roughly 6,200 households, and every one of them is closer to that store than the ring's edge. Radius is the right default for a single location.
Polygon
A hand-drawn or data-driven boundary that follows real barriers: a river, an interstate, a county line, a competitor's trade area. Polygons handle the cases a circle cannot, like a store on a coastline or one whose customers all come from one direction because the highway only has an exit on that side.
Territory
Pre-assigned boundaries shared across a network so that no two locations mail the same household. Essential for franchise systems and dealer networks where locations are close together and a customer who receives two competing offers from the same brand is a customer confused about which store is theirs.
What changes when you target the right shape
- Fewer wasted pieces. Households outside the real trade area are the first ones cut. In dense markets that is often a quarter of a zip-based list.
- No overlap between locations. Territories make the brand's total mail volume equal the sum of its parts.
- Postage becomes a known quantity. Roughly 37% of manufacturer plans in our data specifically address whether postage is reimbursable. When the audience is drawn precisely, postage is a smaller share of the claim and easier to justify.
- Results are attributable. A radius or polygon is a defined population, so response can be measured against it. A zip list is a statistical accident.
The same geography, reused
Once a location's trade area is drawn, it should not live only in the mail tool. The same shape defines where digital ads geofence, which addresses a shared-mail insert covers, and how site selection evaluates a proposed new location against existing territories. Co-Op Command uses one geographic layer for direct mail, EDDM, and territory mapping, so a location's boundary is drawn once and every channel respects it.
Co-Op Command handles the fund, the spend, and the reporting in one system.
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