I designed a small Jersey for your keys. It works great as a gift as well.

In the pictures I was able to add names in fusion but I didnt know how to add it so people can edit a custom name. This way you can add text in top in bambu studio if you want to, it just wont be flush.

With names I print 2 face down and glue them together.

You can change colors to have your favorite team Jersey. Later I can upload different numbers if requested in the comments.

I left the file at a .05 Z height in case people print 2 and glue them, if you are not adding a name, then print it at .1in Z height that way its a little thicker.

Any questions ask away in the comments.