Those are really, truly awesome! I learned ASL alphabet about 30 years ago when a deaf girl attended my grade school. I don't remember all of it, but I remembered enough to go through it and spell out R-I-L-E-Y and i love you. Anyway, I have a metal hand cookie cutter and I might have to do something like this with it!
Here's a link to a cookiecutter site with a few different metal cutters, including one in the shape of the "I love you" sign
Don't forget we can also do the "evil eye" sign and other finger gestures with these... for grown ups!