L: Jim ran across this article from the American Enterprise Institute and wanted to share it. It basically compares the GDPs of US states to the annual GDPs of other countries.
Here's one fact from the article to spur you to click to it if you're interested:
America’s largest state economy is California, which produced $2.75 trillion of economic output in 2017, just slightly below the GDP of the United Kingdom last year of $2.62 trillion. Consider this: California has a labor force of 19.3 million compared to the labor force in the UK of 33.8 million (World Bank data here). Amazingly, it required a labor force 75% larger (and 14.5 million more people) in the UK to produce the same economic output last year as California!