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The Priority Mail Flat Rate® Envelope - EP14F is quick, easy, and convenient, simplifying your Priority Mail® shipping process for documents. Just like the Flat Rate Boxes, this paperboard …

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First-Class Mail is a fast, low-cost way to send envelopes and postcards. See First-Class Mail and Forever stamp prices for a letter and postcard.

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Filter products based on envelope type (e.g., standard, postcard, international, etc.). Sustainable Shipping Supplies. Go green with USPS paper and cardboard packaging. Recycled, …

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USPS postage rates offer low-cost mailing and shipping prices for domestic & international customers. See Forever postage stamp prices and other postage rates.