How Much Extra Postage for a Square Envelope?


The extra postage needed for a square envelope varies with the size of the envelope. A4 envelopes vary in their pricing for example from A3 envelopes.  You need to add $.45 for each extra ounce.
Q&A Related to "How Much Extra Postage for a Square Envelope?"
Letters are subject to a $0.20 surcharge if they are
One first class stamp (depending on weight of course)
Square envelopes require extra postage because they need extra handling on the part of the Post Office. They can't go through the automatic sorting and cancelling machines because
Postcards and letters that weigh up until 1 ounce to Taiwan cost $0.98. Delivery time may vary.
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