The price to mail a First Class Mail Standard Letter (1 oz) is 58 cents.

 

Each additional ounce for a First Class Mail letter will cost 20 cents.

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A USPS nonmachinable surcharge of 30 cents will be added to any letter that cannot be automatically processed (i.e  invitations with wax seals, square shaped envelopes, etc).

 

For example:

* A wedding invitation, weighing less than 1 ounce, with a wax seal will cost 88 cents.

* A wedding invitation, weighing 1.1-2 ounces, will cost 78 cents. 

* A square wedding invitation, weighing 1.1-2 ounces, with a wax seal will cost $1.38. 

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The price to mail a postcard is 40 cents.