Labeling Parts Of A Ship How To Ship Stickers I Sell Through Ebay?

How to ship stickers I sell through ebay? - labeling parts of a ship

I have a vinyl plotter and I thought the sale stickers stickers on eBay, but I'm stuck on the side of the transmission. I just want the cheapest way I wanted to print a label, but does not seem to labels for First-Class Mail letter printed. Small stickers will fit on a normal envelope, and I need not enter the address manually and put stamps in each case, the idea is to sell a lot.