US Postage Cost to mail a letter?
The cost to mail a single envelope sized letter (1 oz.) with a stamp is $0.49
You can actually buy stamps online at Stamps.com and get FREE postage!
It only costs $0.485 per stamp to send a First Class Mail Letter (1 oz.) via Stamps.com
How much does a Postcard Stamp cost?
How much does a Book of Stamps cost?
How much does a single U.S. postage stamp cost?
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