All About Postage {Ideas & Information}

Before you begin addressing envelopes, assemble one complete invitation (including tissue paper, any maps or additional insertions, and the stamp on the return response envelope) and take it to your local post office for weight and measurement. When you order invitations, it is safe to assume that you will have to pay extra postage.

Don’t assume .45 cents will be enough. Due to extra insertions, your invitation could easily exceed one ounce. In addition, often it’s the size and not the weight which may require more postage than one first class stamp, so taking this extra step now can save a lot of aggravation later. Don’t forget to buy stamps for the response card envelopes or postcards while you’re at the post office!

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


  • Rectangular; length is the dimension parallel to the address
  • At least 5″ long  x 3 1/2″ high by .007″ thick
  • No more than 11 1/2″ long x 6 1/8″ high x 1/4″ thick
  • Up to 3.5 ounces


  • Less than 1 oz. = $0.45
  • Less than 2 oz. = $0.65
  • Less than 3 oz. = $0.85
  • Less than 3 1/2 oz. = $1.05

    Letters that meet one or more of the nonmachinable characteristics below are subject to the $0.20 nonmachinable surcharge. Items over 3.5 ounces must be mailed as a Large Envelope or Package.

    • It is a square letter (the minimum size for a square envelope is 5 x 5 inches.)
    • 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

    Postcards – 32 cents
    Size limits:
    Minimum: 3-1/2 inches high by 5 inches long by 0.007 inch thick
    Maximum: 6 inches long by 4-1/4 inches high.
    Additional postage required for larger postcards

    Visit and check out their postage calculator for further details

    Postage Increase 

    If you haven’t heard, there will be a postage increase on January 22, 2012.  If you plan to mail anything from save the dates, engagement party invites, or wedding invitations remember to consider the postage increase when mailing items out. If you are expecting response cards to be returned, don’t get caught with out enough postage or you can expect a giant stack of bright yellow ‘return to sender’ stickers stamped on your  beautifully addressed invitations.

    The increase will affect everything being placed in your mailbox with postcards having the biggest price jump with a three cent increase. If you plan on ordering custom stamps do consider the price increase when you place your order.

    Here are the facts straight from the United Postal Service regarding the postage increase:

    Prices for most Postal Service mailing services will change on January 22, 2012.


    • Letters (1 oz.) – 1-cent increase to 45 cents.
    • Single-piece letters additional ounce rate – unchanged at 20 cents.
    • Postcards – 3-cent increase to 32 cents
    • Letters to Canada or Mexico (1 oz.) – 5-cent increase to 85 cents
    • Letters to other international destinations – 7-cent increase to $1.05

    You can also check out our post about personalized postage if you plan to order custom stamps for your invitations. For more information about the USPS price increases, check out their latest pricing sheet here.

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