The phrase "a small envelope and" is correct and usable in written English.
It can be used when listing items or describing something that includes a small envelope along with other items or actions.
Example: "She handed me a small envelope and a card for my birthday."
Alternatives: "a tiny envelope along with" or "a little envelope and also".
I opened a small envelope and there it was, permission graciously granted.
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.
If you have more than just a small envelope and a note, make sure you have enough postage on the large envelope to cover its size and weight.
Try putting a small envelope on your door and say, "Every time you come in I want a tip".
An older man pulled a small envelope out of his pocket and took out a card.
He later said to his daughter, "What I wanted to tell you and your brother was too big for any piece of paper and a small envelope".
Isobel took a small envelope out of her pocket and poured a gray powder onto the tray. .
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.
Coppola also designed a small envelope clutch that's perfect for evening and a line of sandals that combine the glamour of the '40s with the sleek sensibility of the '70s.
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.
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.
