What is the weight of standard envelope with paper sheet ?
How heavy is standard envelope with letter sheet inside ?
The total weight depends on the size of envelope and grammage of paper.
Single sheet of paper with grammage 80 grams per square meter weights approx. 5 grams.
DL format envelope weights as well approx. 5 grams.
So, in case of small envelope and standard office paper, the total weight can be approx. 10 grams.