What does the HAM license look like?
Is it a card? A document?
All I could find on google is ham radio license plates.
For most purposes, there is no "official" paper license in the United States anymore. Your record in the FCC's online database is what gives you a license to operate. However, if you like, you may download and print a PDF from their system. It looks like this:
except that, for your own license, you can download one that says "OFFICIAL COPY" instead of "REFERENCE COPY". As you can see, they provide cut-out marks for a certificate version that looks like it should fit a 5x6" frame, and a "wallet" version that folds to the size of a standard ID card. Each one provides a place for you to affix a signature if you would like.