USPostal Rates – US Postage Rates 2011 –

USPostal Rates – US Postage Rates 2011 – First Class Mail Retail Envelopes such as Manila, Tyvek and similar large mail flat envelopes 1-13 ounces. Sources: http://www.accuracyproject.org/abbreviations.html https://ygraph.com/chart/1287

USPostal Rates – US Postage Rates 2011 –

USPostal Rates – US Postage Rates 2011 –