Shipping without a printer

[Turnitin2004]

Hey All

Super newbie question, but I was just wondering the best way to ship without having a printer at home.

I am tidying up my apartment, and have maybe 20-50 cards I'd like to sell to just clean up (probably would be sold in lots no bigger than 3-5 cards). None of them are expensive, but I don't think I would plain white envelope any of them.

If someone wouldn't mind could they explaining how I can still get the printing label without having a printer so I can send the items out (or if I am allowed to just hand write the info on a 5x7 bubble mailer and bring it to the USPS to be weighed and shipped) Id appreciate it.