I go to a printer local, and I ask them to print them in a sticky-tabloid, in american terms sticker or glossy paper (something like that)
and they look pretty good and... in fact I print some today, here the sample to see what I mean...
the stickers are in the prints are in the bottom as you can see
this one has a little fail in the outline, but I can fix it (I believe)... this is a close up and you can see how they look
and last but not least important, the fail with the NES labels... they were not the correct size
thanks for the help guys, but size wasn't correct :c