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USPS Postage Rate Increase Starts January 27, 2019 - ShipWorks
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Priority Mail Flat Rate Padded Envelope | USPS.com
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Priority Mail Flat Rate® Small Envelope - EP14B | USPS.com
USPS wants to raise the price of a first-class postage stamp to 66 cents
USPS ANNOUNCES 2020 POSTAGE RATES – Official Mail Guide (OMG)
