The caveat is that the item or items you are shipping must fit into a pre-defined box provided by the United States Postal Service (USPS).

The Flat Rate shipping that is offered by the United States Postal Service is a service assigns a shipping price based on the box that used no matter what the weight of the item is (if it is under 70 pounds). Packages (over 108 inches but not more than 130 inches in combined length and girth) are charged an oversized price.Flat rate shipping is convenient, but may not always be the best deal. Very large USPS Retail Ground or Parcel Select This is often referred to as a balloon price. Light (less than 20 pounds) are charged the postage for a 20 pound package. USPS Retail Ground packages that are large but very Some parcels may be subject to specialized prices. More about Commercial Parcels - Parcel Select Balloon and Oversized Prices for Parcels More about Physical Standards for Commercial Parcels

No more than 25 pounds (35 pounds for Parcel Select and Parcel Return Service, except books and other printed matter which cannot exceed 25 pounds).

No more than 27 inches long x 17 inches width x 17 inches high.If you prepare your parcels so that they can be processed on Postal Service equipment, your parcel is considered 'machinable.' Machinable parcels are easier to process and deliver, Length is the measurement of the longest dimension and girth is the distance around the thickest part (perpendicular to the length).

At least 3 inches high x 6 inches long x 1/4 inch thick.Įxcept for USPS Retail Ground and Parcel Select, no mailpiece may measure more than 108 inches in length and girth combined.Parcel Dimensions Generally, commercial parcels must measure: Parcels offer some of the best value for your postage dollars.

Many mailers send small parcels in all classes of mail. You may be surprised to find out that 'parcels' are not just big boxes. USPS Marketing Mail Eligibility Decision Tree.Designing Letter and Reply Mail (PUB 25).

Usps small flat rate box dimensions