How many stamps are needed on a 10x13 inch clasp envelope if only one piece of paper is on it?

Usually one sheet of paper, even in a big envelope, is good enough for one stamp, since it is less than one ounce - as long as the paper isn't too heavy.

Tags: one sheetone piecesheetstamp 
Wednesday, February 01 2012


Source: http://www.usps.com

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