# NAICS 561431: Private Mail Centers

The SBA size standard for NAICS 561431 is $19,000,000 in average annual receipts (13 CFR 121.201).

| Field | Value |
| --- | --- |
| Code | 561431 |
| Title | Private Mail Centers |
| Level | 6 |
| Parent | 56143 |
| Size standard | $19,000,000 in average annual receipts |
| Footnote | - |

## Description

This U.S. industry comprises (1) establishments primarily engaged in providing mailbox rental and other postal and mailing (except direct mail advertising) services or (2) establishments engaged in providing these mailing services along with one or more other office support services, such as facsimile services, word processing services, on-site PC rental services, and office product sales.

## Sources

- Census NAICS: https://www.census.gov/naics/
- SBA size standards: https://www.sba.gov/document/support-table-size-standards

## API and MCP

- REST: GET https://samgovapi.io/api/v1/naics/561431/size-standard?revenue_usd=...
- MCP tools: naics_lookup, size_standard_check

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