The $100 bill is the largest printed these days. The large denominational notes of $500, $1000, $5000, $10,000, and $100,000 were printed for banking transactions. They weren't for the general public to use. Today, banks buy their money electronically and therefor has no need of the large notes. The large notes were demonatized in 1969. Other than the $100,000 bill, all are still legal to own by private collectors.