What Are Standard Sizes for Envelopes?
Envelopes are used for a variety of purposes, from sending and receiving business correspondence to inviting family and friends to an upcoming event. Because of their different uses they are manufactured in many styles and sizes. Here are some of the more common types of envelopes and the range of sizes they come in.
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Commercial
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These envelopes are typically used for personal correspondence, such as when mailing a letter to a friend. They range in size from a width of 5.5 inches and a height of 3.0625 inches, to a width of ll.5 inches and a height of 5 inches, with the standard "number 10" envelope size being the most common at a size of 9.5 inches wide by 4.125 inches high.
Window
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The window envelope contains a clear plastic rectangular area on the front that is used to display the mailing address. They are often used by companies when mailing billing invoices to clients or paychecks to employees. The range of sizes runs from 6 inches wide by 3.5 inches high, to 11.5 inches wide by 5 inches high.
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Announcement
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Announcement envelopes are used when mailing invitations, such as for weddings or parties, and to inform friends and relatives of an upcoming graduation. They are usually purchased with matching paper stock that is often engraved or otherwise customized. Sizes range from 5.75 inches high and 4.375 inches wide, to 8.875 inches wide by 3.975 inches high.
Catalog
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Catalog envelopes are used to mail larger items such as magazines or important paper documents that are not meant to be folded. Sizes are from 6 inches wide and 9 inches high to 11.25 inches wide by 14 inches high.
Metal Clasp
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These are used for many of the same purposes as the catalog envelope, with the major difference being that they have a metal clasp attached to the back to secure the flap in addition to the adhesive material. Sizes run from 2.5 inches wide by 4.25 inches high to 12 inches wide by 15.5 inches high.
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