Tags similar to those Butch mentioned, though perhaps a bit smaller, are called Merchandise Tags. They are available at Wal-Mart, Staples and Office Depot, usually in lots of 100 or more. Of course, you can roll your own with some string, a hole punch, and a stack of 3 by 5 cards, old business cards, scraps of Braille paper, or card stock. I have found that a good way to make Braille hold up better on labels made in this fashion is to first cover the card with a thin plastic "peal and stick" laminating sheet, also available at the above stores. Back in the day, my mother, the secretary at work, or whoever I could draft, would cut old sound sheet magazines into sections, giving each a more or less straight edge so that the strips would roll into a Perkins more easily. I would ask them to do the cutting because I can't cut a straight line with scissors if my life depends on it. I used those labels for various food containers, including those that went into the freezer. They would survive several cycles through the freezer as well as the dish washer if I forgot to remove them first. I would also use this material to make labels for the tape cartridges that were in use in radio stations until everything moved to electronic storage. I kept the 3M Scotch Tape factory in business labeling those tapes that way. I haven't gone looking for them in a long time, but the above mentioned stores, or craft stores, may also have plastic sheets that would be thick enough to hold braille.