How big are those perfume samples you can request on the internet?

Do the samples come in small containers or are they just the pieces of paper with the scent on it?How big are those perfume samples you can request on the internet?
i ordered a sample of old spice cologne, and i thought it would be a little bottle, but it was a wet piece of cloth that you rub on yourself once.... had to wait 6 weeks for that!How big are those perfume samples you can request on the internet?
I have know idea, these samples you can request on the Internet are they free of charge?
Usually just pieces of paper with a scent, like you would get in a magazine.