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I want to create my own RSVP postcards using cardstock. I have searched and searched and can not find what I am looking for. What I want is to know what are the requirements (sizing and weight) so I can use postcard stamps. Also, does anyone know of a template that I can use for the front and back of the cards? I am at a total loss and ready to pull my hair out!!!

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Postcard Standards:

Minimum Allowable Postcard Size: 3.5 x 5 Inches

If the width is less than 5 inches or the height is less than 3.5 inches the USPS will NOT mail your postcard.

Maximum Allowable Postcard Size: 4.25 x 6 Inches

If the width is greater than 6 inches or the height is greater than 4.25 inches, the postcard must be mailed as a letter, higher rate and all.

Minimum Thickness: .007 Inches

Any mail less than the minimum is considered Non-Mailable and the USPS will NOT deliver it.

Maximum Thickness: .25 inches

Exceeding the maximum puts the mail piece into a different mail class, called a Parcel.

Intermediate Sizes are Allowable

A 4 x 5.5 inch postcard is mailable at the postcard rate. As long as a mail piece meets the size, thickness, weight and aspect ratio requirements above, it can be mailed as a postcard.

Minimum Thickness: .007 Inches

Maximum Thickness: .25 inches

Space reserved for USPS Barcode and Endorsements


Aspect Ratios

Aspect Ratio Rule: a 1st Class mail piece (letter or postcard) must have an aspect ratio that falls between 1 to 1.3 and 1 to 2.5 inclusive.

Definition of Aspect Ratio: The length (width) of a piece divided by the height of the piece.

A letter with the dimensions of 4x6 has an aspect ratio of 1 to 1.5 which falls into the allowable aspect ratio range.

Height = 1 Width = 1.5 ( 6 / 4 )

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