|If you are designing a postcard or an envelope to be mailed through the United States Post Office then there are a few regulations you will need to follow to ensure that your postcard meets the guidelines required for mailing.|
|Do Not Round Corners|
|Post Office will not accept or mail any postcards with rounded corners.
Only round the corners if your design will be used as a flyer or promotional handout.
|Standard 4" x 6" Postcard|
|Standard 4.25" x 5.5" Postcard|
|Standard 5" x 7" Postcard|
|Standard 5.5" x 8.5" Postcard|
|Standard 6" x 11" Jumbo Mailer|
|Standard 4.15" x 9.5" Envelope|
|Zone & Color Key|
|Yellow Area - Do not put any addresses here with a zip code and state, otherwise there may be a chance of your postcards being returned to you.|
||Red Area - No text or graphics are allowed that are greater than 7% grayscale. This is especially important for the Post Office Barcode Area. Unless you print your own mailing barcodes, this area must be kept clear or your postcards will not be mailed or returned to you.|
|For more comprehensive details about postal regulations, click here|