Being a type one diabetic for 15 years, I've gone through plenty of medical IDs. I had been searching for something small and discrete for a long time now and I'm so glad I came across this one! It's about the size of a dime and since I got the longest necklace it stays nicely hidden. The engraving is perfect and whoever would need to be able to read the ID incase of an emergency will have no trouble. I've had it for a few weeks now and it has yet to be scratched, it still looks like I just took it out of the box.