Envelopes will hold an enclosure sized A1 (3.5" x 4 7/8") and 3.5" x 5". These are commonly used for RSVP Cards and they are the smallest envelope that can be mailed through the United States Postal System.
Envelopes will hold an enclosure sized A1 (3.5" x 4 7/8") and 3.5" x 5". These are commonly used for RSVP Cards and they are the smallest envelope that can be mailed through the United States Postal System.
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