The ring is sort of a secret symbol to other aces without alerting aphobes since no one outside the community is going to recognize it. It can also act as a reminder to yourself that you're not alone in being ace.
​
It's usually black and worn on the middle finger of the right hand. Other than that, there aren't any other rules. I personally like simpler ones better, but a lot of people like more intricate designs.
​
Mine is made of silicone
​
I found mine on Amazon, there are probably cheaper ones, but this was nice because it also has a white variant (for aromantic). You can use a printable ring sizer to find your ring size if you don't already know it.
​
I got my ace ring because I wanted a way to show my pride without being too obvious about it, and a simple ring is perfect for that.