These are bootleg Irwin keychain figures. Obviously they’re missing the actual key chains. The paint jobs are not the best, but they aren’t bad either. My set came rather dirty and I’ve had issues getting rid of it. I’m also not quite sure why Chibiusa has a tiara.
Despite all the issues, they’re quite adorable just as figurines. I believe some of them may be from different sets, especially Neptune. Her eyes and style seems different. Oddly enough, the copyright information on the back is the same on all of them.
Here’s an example of the copyright on the backs of the figures: