{"id":154657,"date":"2022-04-11T13:42:39","date_gmt":"2022-04-11T13:42:39","guid":{"rendered":"https:\/\/sdcmainprod.wpengine.com\/usps\/large-envelopes\/"},"modified":"2025-10-09T09:50:25","modified_gmt":"2025-10-09T09:50:25","slug":"large-envelopes","status":"publish","type":"page","link":"https:\/\/www.stamps.com\/usps\/large-envelopes\/","title":{"rendered":"USPS Large Envelopes, Flat Mail"},"content":{"rendered":"
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A Guide to USPS\u00ae Large Envelopes and Mailers: Dimensions & Pricing<\/h1>\n

Sending a CD, magazine, legal document, or other item in a large envelope? Make sure the dimensions and prices are right before you send.<\/p>\n<\/div>\n \n \n <\/div>\n\n \n <\/div>\n <\/div>\n\n<\/div>\n<\/div><\/section>\n\n

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What are large envelopes?<\/h2>\n\t\t\t\t\t\t\t\t

The term \u201clarge envelopes,\u201d also known as flat mail, refers to First-Class Mail\u00ae sent in envelopes that exceed a certain size and are used to send items and documents you wouldn\u2019t want folded. To send large envelopes, you need postage stamps and access to a postage meter, or you can ditch the postage meter and print postage<\/a> online with us.<\/p>\n<\/div>\n\t\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tLearn About Meters<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\n\t\t
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What are the dimensions of a large USPS envelope?<\/h2>\n\t\t\t\t\t\t\t\t

Large envelopes refer to First-Class Mail sent in envelopes that exceed either 6\u215b\u2033 in height, 11\u00bd\u2033 in width, or \u00bc\u2033 in thickness. Typically, large envelopes are large enough to fit a standard, unfolded 8\u00bd\u2033 x 11\u2033 sheet of paper. Envelopes used for flat mail cannot be more than \u00be\u2033 thick, 12\u2033 high, 15\u2033 long, or weigh more than 13 ounces. USPS considers any envelope bigger than this size to be a package, so you\u2019ll want to monitor your dimensions. <\/p>\n<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\n\t\t

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USPS postage rates for large envelopes <\/h2>\n\t\t\t\t\t\t\t\t

If your large envelope exceeds USPS\u2019 dimensions, it will be subject to higher prices. Pricing depends on the weight of the envelope with prices starting at $1.50 and increasing by $0.27* for each additional ounce, and your large envelopes sent in the U.S. will generally arrive within three business days.<\/p>\n<\/div>\n\t\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tView Postage Rates<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t
*For First-Class mail flat, each additional ounce, 1 oz. – 4 oz., is $0.27. For 5 oz. – 9 oz., each additional ounce costs $0.28. For 10 oz. – 13 oz., each additional ounce costs $0.30. <\/div>\n\t\t\t\t\t<\/div>\n\n\t\t
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The benefits of sending large envelopes with us<\/h2>\n\t\t\t\t\t\t\t\t

We\u2019ll tell you exactly how much postage is required to send your mail to any domestic or international location, and you can print USPS-approved postage and address labels from the comfort of your own home or office. Send the simple way. <\/p>\n<\/div>\n\t\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tLearn More<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\n\t\t
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Start mailing today<\/h2>\n\t\t\t\t\t\t\t\t

Print your own postage in seconds without the hassle of expensive hardware or postage math. Find the plan that works for your business and start saving today.<\/p>\n<\/div>\n\t\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n Get Started\n <\/a>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t
*For First-Class mail flat, each additional ounce, 1 oz. – 4 oz., is $0.27. For 5 oz. – 9 oz., each additional ounce costs $0.28. For 10 oz. – 13 oz., each additional ounce costs $0.30. <\/div>\n\t\t\t\t\t<\/div>\n\n\t\t
<\/div>\n\t<\/div>\n<\/div>\n<\/div><\/section>\n<\/div>\n\t\t\t<\/div>\t\n\t\t\t
\n\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\t\n\t<\/div>\n<\/div><\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":71,"featured_media":0,"parent":155747,"menu_order":0,"comment_status":"open","ping_status":"open","template":"templates\/new-blocks.php","meta":{"_acf_changed":true,"inline_featured_image":false,"footnotes":""},"class_list":["post-154657","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\nCheaper USPS\u00ae Large Envelopes & Flats Rates by Size<\/title>\n<meta name=\"description\" content=\"Learn USPS large envelope dimensions, weight limits, postage rates & how to mail flats conveniently with Stamps.com.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.stamps.com\/usps\/large-envelopes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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