Pack of 3 13-15/16" (L) x 11-3/4" (W) x 12-1/16" (H) $48.00 Priority Mail® Forever Prepaid Flat Rate Small Box Includes Customer's Return Address 8-11/16" (L) x 5-7/16" (W) x 1-3/4" (H) $12.60

Use USPS PO Boxes for business or personal use. Learn how to reserve, rent, renew, and manage a PO Box online, as well as how much a PO Box costs.

Select another box size or Post Office™ location to find an available box. If you choose to apply for the waitlist, we will send general details on timing and upcoming availability in your waitlist confirmation …

Welcome to USPS.com. Track packages, pay and print postage with Click-N-Ship, schedule free package pickups, look up ZIP Codes, calculate postage prices, and find everything you need for …

The Priority Mail Flat Rate® Medium Box is an easy way to ship featuring predetermined rates regardless of weight (domestically) or destination. This item ships in single, or a pack of 10 or 25 boxes.

Pack of 3 13-15/16" (L) x 11-3/4" (W) x 12-1/16" (H) $48.00 Priority Mail® Forever Prepaid Flat Rate Small Box Includes Customer's Return Address 8-11/16" (L) x 5-7/16" (W) x 1-3/4" (H) $12.60

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Find USPS locations like Post Offices, collection boxes, and kiosks so you can send packages, mail letters, buy stamps, apply for passports, get redeliveries, and more.

Shop our selection of Boxes, Priority Mail Shipping Supplies on the USPS.com Postal Store

Pack of 10 15" (L) x 9-1/2" (H) $0.00 Priority Mail Flat Rate® Small Box Single, Pack of 10 or 25 8-11/16" (L) x 5-7/16" (W) x 1-3/4" (H) $0.00