There are certain measures that USPS consider while calculating prices. Package dimensions are one of them. While send packages from USPS , they are accepting predefined shapes of packages. Lets Look into here.
Shape Details Used By USPS
- Packages ( BOX)
- Square Envelope
Packages – Shape Dimension
USPS recommends to use “Package” when each dimension (Length, Height, and Width) of your item measures 12″ or less.
You must have to use “Package” when the length plus girth (the distance around the thickest part) of a package equals 84″ or less and it is less than 1 cubic foot.
Also use “Package” when any dimension (Length, Height, or Width) measurement is over 12″.
If you are unsure you will be prompted to enter your package dimensions and the correct postage price will be calculated based on your entries.
Envelopes Dimension at USPS.Com
Large envelopes exceed at least one of these dimensions
For example, an envelope 10″ long x 8″ high x 1/4″ thick is considered a large envelope because it exceeds the minimum height dimension.
Large envelopes that are rigid, nonrectangular, or not uniformly thick pay package prices.
Letter Dimension Shape Details
Any item smaller than the minimum dimensions is not mailable. For items larger in length, width, or thickness, see large envelopes or packages. For envelopes, length is the dimension parallel to the address.
Letters that meet one or more of the nonmachinable characteristics below are subject to the nonmachinable surcharge.
- It is a square letter
- It is too rigid – does not bend easily
- It has clasps, string, buttons, or similar closure devices
- It has an address parallel to the shorter dimension of the letter
- It contains items such as pens that cause the surface to be uneven
- The length divided by height is less than 1.3″ or more than 2.5″
The minimum size for a square envelope is 5″ x 5″. Square letters are subject to the non machinable surcharge.
USPS Postcard Dimension
Any item smaller than the minimum dimensions is not mailable. For postcards, length is the dimension parallel to the address. Postcards must be rectangular and be made of unfolded and uncreased paper or card stock.
Large cards that exceed the maximum dimensions of a postcard pay the First-Class Mail® letter price.