Includes Customer's Return Address 12-1/4" (L) x 12" (W) x 6" (H) $31.40 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" …

2 days ago · A practical guide to USPS flat rate boxes. Sizes, dimensions, pricing, and when flat fee shipping with USPS makes sense for businesses.

Oct 5, 2025 · USPS has several pricing tiers that can dramatically impact the shipping rates you receive for your packages. USPS Retail Pricing is the starting tier for pricing. This is the USPS rate you’ll pay …

Jan 9, 2024 · Small USPS Flat Rate boxes start at $8.45 (unless you have a commercial account) and are ideal for shipping a smartphone-sized item. On the top end, large USPS Flat Rates boxes start at …

Sep 4, 2025 · Learn all about USPS boxes, including types, costs, free options, and shipping tips to help you save money and choose the right packaging for your business.

Discover USPS flat-rate box dimensions—small, medium, large, APO/FPO tiers—and when flat-rate boxes offer the best value. Includes dimensions, weight limits, and specialty options.

Oct 27, 2025 · With e-commerce booming, these boxes offer predictable pricing and reliable delivery. This guide covers sizes, rates, and selection tips to optimize your shipping strategy.

What Sizes Are Available? Across the U.S. Postal Service, PO Boxes are available in 5 sizes. However, not all Post Offices have every size. Size 1 - X-Small (3" x 5 1/2" x 14 3/4")

Sep 5, 2024 · USPS boxes come in small, medium, and large sizes with different dimensions and costs. Learn about USPS's different boxes here.

The table below shows options for diferent Priority Mail Boxes and Envelopes, along with dimensions, online postage pricing and weight options.