The World's Smallest Postal Service
A new company that sends out miniature letters started in San Francisco recently.
You just write a normal letter to a person and send it to this company.
They write them in a smaller version, seal them up and send them off.
It costs $8 to send one letter.
Each letter comes with a small magnify glass so the mailman and receiver of the letter can read it.
People are using this services to surprise friends or play jokes on them.
Check them out here.