145.zip May 2026

: All mailpieces must be separated by delivery route or Post Office Box section.

: Delivery statistics and route information must be obtained using the USPS EDDM web tool . Physical Standards for 145 Flats

This section outlines the requirements for preparing EDDM-Retail flats to ensure they are accepted for delivery. 145.zip

If your request refers to technical text for a product description, "145 Zip" often refers to the from KUIU . Material : Uses Nuyarn® Merino technology.

: More than 6-1/8 inches but not more than 12 inches high. : All mailpieces must be separated by delivery

: Mailings must consist of at least 200 pieces (or 50 pounds) but no more than 5,000 pieces per day per 5-digit ZIP Code.

: Prepared mail must be presented directly to the specific delivery Post Office or destination unit (DDU/S&DC) responsible for those routes. If your request refers to technical text for

To qualify under these standards, the pieces must meet specific dimensions: