Postage - a single stamp buys how many oz. ?

Question

I am too far away to drive to the post office to weigh my single piece of mail. It is 3 page order form in a small envelope. I don't know if that needs more than standard postage. I don't know what 3 pcs of paper weighs. What is the Oz. limit and how many sheets of copy paper can I send on a single stamp?

Answer 1

.42 = not over 1 ounce

.59 = not over 2 ounces

Your small envelope cannot be smaller than 3.5 inches x 5 inches.  Three pieces of paper should be ok.

Answer 2

you should be good with the standard postage : )