What are the USPS Package Dimensions ?

USPS shape Dimension
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.

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)
  • Envelopes
  • Letter
  • Square Envelope
  • Postcard

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.

Package Dimension usps
Package Dimension

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

USPS Envelopes

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.

DimensionMinimumMaximum
Height6 1/8″12″
Length11½”15″
Thickness¼”¾”
Table Data : USPS Envelope Size

Large envelopes that are rigid, nonrectangular, or not uniformly thick pay package prices.

Letter Dimension Shape Details

Letter Sizes at USPS.Com

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.

DimensionMinimumMaximum
Height3½”6⅛”
Length5″11½”
Thickness0.007″¼”
Table Data : USPS Letter Sizes

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″

Square Envelope

The minimum size for a square envelope is 5″ x 5″. Square letters are subject to the non machinable surcharge.

USPS Postcard Dimension

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.

DimensionMinimumMaximum
Height3½”4½”
Length5″6″
Thickness0.007″0.016″
Table Data : USPS Postcard Dimension

Large cards that exceed the maximum dimensions of a postcard pay the First-Class Mail® letter price.

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