What is the cheapest shipping option through USPS first class?

I am trying to ship a small item that is small enough to fit in. What is the cheapest shipping option?
Answers

Gary

Use a bubble mailer if it’s not a letter. and include tracking. Please DO NOT SEND items other than a letter in a plain envelope. They will get lost because the envelope will get shredded.

Related questions

Blonde Hair and tall height - Views through the world?

Another family member, who is even taller than I, stopped in Africa and people were shocked because of his height. Now, here's the main questions - if I were to travel somewhere (...
View details

If I find round trip airfare is cheaper than the one way to my destination, can II just buy the roundtrip and dont show up for return trip?

View details