1 box, Priority Mail Express Tape 14-3/4" (L) x 10-1/4" (W) x 10" (H) $0.00 Priority Mail® Forever Prepaid Flat Rate Medium Box Includes Customer's Return Address 11" (L) x 8-1/2" (W) x 5-1/2" (H) …

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

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.

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

Jan 5, 2026 · A practical guide to USPS flat rate boxes. Sizes, dimensions, pricing, and when flat fee shipping with USPS makes sense for businesses.

Nov 7, 2025 · Discover how to select the right shipping box sizes for USPS, UPS & FedEx. Minimize DIM-weight fees, fit carrier rules, and cut fulfilment costs.

Use our Priority Mail Flat Rate Envelopes or Boxes that come in standard sizes so you don't have to worry about measuring them. When sealing a Flat Rate Envelope or Box, the container flaps must be …

May 1, 2020 · Check out our list of the dimensions of all the free USPS boxes the Postal Service offers on their website, written out in decimal points and not fractions.

Apr 8, 2025 · Streamline your shipping with USPS Flat Rate Boxes! Our guide covers everything you need to know about these cost-effective, weight-agnostic boxes for seamless deliveries nationwide.