The phrase "a small envelope of" is correct and usable in written English.
It can be used when describing a physical object that is small and resembles an envelope, or metaphorically to describe a small amount of something contained within a boundary.
Example: "She handed me a small envelope of seeds to plant in the garden."
Alternatives: "a tiny packet of" or "a little pouch of".
The action squeezes out a jet of water that spurts so fast it opens up a small envelope of space in its wake.
The envelope addressed to former CIA director John Brennan and sent to CNN also contained a small envelope of as-yet-unidentified white powder that the New York Police Department reports was not biologically harmful.
The Lugano report authors reported that they used a small envelope of fuel provided by Rossi; the report included mass spectrometer analyses of the fuel, but that is all.
The envelope sent to CNN, which caused the company to evacuate Time Warner Center in Manhattan, contained a pipe bomb and a small envelope of as yet unidentified white powder, something often used in hoax letters intended to cause disruption in the years since a 2001 anthrax attack that killed five people.
An older man pulled a small envelope out of his pocket and took out a card.
Isobel took a small envelope out of her pocket and poured a gray powder onto the tray. .
The European Central Bank is even more willing to appeal to those who want to have a lot of money in a small envelope, offering notes in denominations of 100, 200 and 500 euros.
She said that six of my uncles...received a small envelope under the main gates of their houses.
But Greek tax officials were notoriously easy to bribe with a fakelaki (small envelope) of cash.
For this they used hand lines, the standard equipment of undercapitalized fishermen: monofilament wrapped around a flat piece of wood the size of a small envelope and knotted to a single hook, with a lead sinker.
ONE day in October 1990, the iconoclastic economist Julian L. Simon walked out to get the mail at his house in the Washington suburb of Chevy Chase, Md. In a small envelope sent from Palo Alto, Calif., he found a sheet of metal prices, along with a check for $576.07 from the biologist Paul R. Ehrlich.
