are on “best” to get the nicest results. print them on a high quality card stock or nice linen paper and attach them with ribbon, chain, twine or whatever suits your fancy.
i would recommend using tags like this only on items that are truly a limited edition. if you plaster these on everything; it won’t work. save them for a few select items that you only plan to make a few of. this is great for custom prints, or even a specific style of jewelry.
people love the idea of having something rare and unique and will often pay higher prices for such items if they are high quality. it can 