Quick Mailpiece Design FAQ

Do invoices and statements have to be mailed First Class?

Yes. According to the USPS, “Matter containing personal information, partially or wholly handwritten or typewritten matter, or bills or statements of account must be mailed as First-Class Mail, unless mailed as Express Mail or Priority Mail, or otherwise exempted by the Postal Service.” (View source).

Does the address box have to be a certain size?

Yes. The minimum size for an address box is 4 x 1.5.

If we have to make a white box to put the indicia in, does the white box have to be a certain size?

Yes. The indicia box must be approximately .75 x .875 (it can be slightly smaller if absolutely necessary as long as it can be easily read).

Does a customer have to put a return address on their mail when using an indicia?

Only if they are mailing non-profit. Otherwise, no, a return address is not required when using an indicia.

How do I know if something is a card, letter or a flat?

Postcards (true postcards, that is) must be a minimum size of 5″ x 3.5″, a maximum size of 6″ x 4.25″ and 7pt (.007) thick.

Letters (including what we often refer to as “postcards” larger than 6″ x 4.25″) must be rectangular with a minimum of 5″ x 3.5″, a maximum of 11.5″ x 6.125″, a minimum of 9pt (.009) thick and a maximum of 1/4″ thick.

Flats are rectangles larger than 11.5″ wide or 6.125″ tall, square in shape, or are taller than they are wider, and are subject to significant postage penalties.

Note: the above size restrictions apply to width x height only (not height x width).

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