It’s important to note that your invitations will most likely NOT fall under the typical 1 ounce postage weight limit you may send your other cards and mail by. Please always get your invitations weighed at the post office before attempting to mail them. This could make the difference between your guests receiving the invitation or having them lost in the mail.
2013 USPS Guidelines
|Height||3-1/2 inches||6-1/8 inches|
|Length||5 inches||11-1/2 inches|
|Thickness||0.007 inch||1/4 inch|
|Any item smaller than the minimum dimensions is not mailable.
For larger items, 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. For items over 3.5 ounces, see large envelope or package prices.
|•||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 (calculate this below)|
The minimum size for a square envelope is 5 x 5 inches.
Square letters are subject to the nonmachinable surcharge (currently $0.20).
2013 USPS Postage
|Weight Not Over||Price|
*2 ounces is the typical postage for a wedding invitation while an RSVP envelope should have a 1 ounce stamp. Always take an invitation to the post office for weighing prior to mailing.
Postcards – $0.33
- 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