So, I sent my husband to the post office to ship a ring I sold. I asked him to get a tracking number and send it the cheapest way possible. It was a tiny little padded envelope which usually costs me about 72 cents to ship. I figured a tracking number would be about 45 cents more. They charged him $5.95. When I asked him why, he said that they told him that if an envelope is less than 3/4 of an inch thick and you want to track it, then it has to be sent the fastest way. How does this make any sense? Why does it matter how thick it is? The guy was like, "Yeah, it doesn't say that little rule online." Sorry, just doesn't make sense to me!