Large Square Envelopes - 7x7, 8x8, and 9x9 inch square envelopes

    Considerations for using Square envelopes: 
    • Envelope size is exactly the size of its name.
    • Enclosure size should be .25 inches or smaller on both sides.
    • There may be an extra charge for mailing square envelopes.  Count the costs by checking out the  USPS mailing regulations.