Answers to the Top 10 Questions About USPS Mailing Rates

We answer all of your questions about USPS mailing rates. From the standard size of a letter to any additional fees that may occur when shipping internationally.

You are watching: Do square envelopes require extra postage

Is there an extra charge for business envelopes?

NO. Most standard size business envelopes are #10 (4 1/8 x 9 1/2) which meet the USPS machinable envelope size requirements.

Does it cost extra to mail a yellow envelope?

NO. The color of the envelope does not matter as long as the address is clearly legible.

Does it cost extra to mail a Manila envelope?

Depends. It’s not the style of the envelope that will determine its mailing rates but the weight. If you mailed a #10 manilia envelope weighing 1 oz, standard mailing rates would apply. Once it goes over the 1 oz weight, additional postage is always required. 

Is there extra postage on square envelopes?

YES. According to USPS.com, for an envelope to be eligible for mailing at the price for letters, a piece must be:

RectangularAt least 3-1/2 inches high x 5 inches long x 0.007 inch thickNo more than 6-1/8 inches high x 11-1/2 inches long x 1/4 inch thick

Is there extra postage on 5×7 cards?

NO. This will fit inside of a standard A7 envelope, which requires no additional postage.

Is there extra postage for clasp envelopes?

YES. Any envelope that has clasps, strings, buttons or similar closure devices are deemed nonmachinable and result in additional handling charges.

Is there extra postage for Hawaii?

NO. Hawaii is part of the USA, so standard postal stamp fees will apply when mailing a standard 1 oz letter to Hawaii.

Is there extra postage to Puerto Rico?

NO. Puerto Rico is part of the USA, so standard postal stamp fees will apply when mailing a standard 1 oz letter to Puerto Rico.

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Is there extra postage to mail to Canada?

YES. Any mail sent outside of the USA is sent First-Class Mail International. There is one price for 1-ounce machinable letters and postcards anywhere in the world.

How many stamps do I need to send a letter overseas?

Important things to remember about envelope rates:

1 oz $0.492 ounces $0.673 ounces $0.873.5 oz $1.08

Rates per Dimensions 

Minimum – 3-1/2 inches high x 5 inches long x 0.007 inch thick

Maximum – No more than 6-1/8 inches high x 11-1/2 inches long x 1/4 inch thick

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http://pe.usps.com/cpim/ftp/manuals/dmm100/dmm100.pdf
Posted in Mailing & Printing, QuestionsTagged First-Class Mail International, Questions About USPS Mailing Rates