business envelope

noun

1. a postal envelope for standard-size business letters 8½ × 11 inches (20 × 28 centimeters), measuring about 4½ × 9 inches (11 × 23 centimeters).

Example Sentences

It was not immediately clear why the standard-sized business envelope was sent over the East River after first being opened, but the discovery of its contents caused the 11th floor of the Brooklyn offices to be evacuated Friday before it was eventually determined the powder didn’t pose a threat.

From Washington Times

She crossed the room again to straighten the stack of books on his lamp table, and was doing so when a pamphlet the size of a business envelope caught her eye.

From Literature

With a hyphenated surname, she would no longer fit into the window of a business envelope.

From Literature

From any other institution, an ordinary No. 9 business envelope would look like an automatic “no.”

From New York Times

He should have had a letter head and a business envelope.”

From Project Gutenberg