Square card postage 2014

First things first: Before you begin addressing envelopes, assemble one complete invitation (including tissue paper, any maps or additional inserts, as well as the stamp on the return address envelope), and take it to your local post office for weight and measurement.

When you order invitations, it’s safer to assume that you will have to pay extra postage – the usual 49-cent First Class stamp probably will not be enough given the extra weight of your inserts. Additionally, it’s often the size and shape – not the weight – that may require more postage, so taking the extra step of going to your post office now can save a lot of aggravation down the road. (And hey, while you’re there, you can pick up stamps for the rest of your response card envelopes!)

Postage Requirements for Wedding Invitations | As Seen on TodaysBride.com

Overall, First Class postage rates are based on the shape as well as the weight of the envelope. USPS follows the guidelines below:


  • Considered letter size if it is rectangular (length is the dimension parallel to the address)
  • At least 3 ½ inches high x 5 inches long x .007 of an inch thick
  • No more than 6 1/8 inches high x 11 1/2″ long x ¼ of an inch thick
  • Up to 3.5 ounces (see weight postage guidelines below). Items that weigh more than 3.5 ounces must be mailed as a Large Envelope or Package.
  • Letters that meet one or more of the following nonmachinable characteristics are subject to a surcharge of 21 cents: It is square-shaped (the minimum size for a square envelope is 5 x 5 inches). / It has an address parallel to the shorter dimension of the envelope. / It is too rigid or does not bend easily. / It has clasps, buttons, strings or similar closure devices. / 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.


  • Less than 1 oz. = 49 cents
  • Less than 2 oz. = 70 cents
  • Less than 3 oz. = 91 cents
  • Less than 3 1/2 oz. = 1.12 cents
  • For postcards = 34 cents

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