I've noticed that older foreign bills are often HUGE, at least compared to modern US bills. Why? At first I thought it was due to buying power. For example, the 1912 500 ruble note at the time had an exchange rate of approximately $20,000 in 2018 dollars. The 1931 Yugoslavia 1000 dinara is about $270 in today's dollars. So quite a bit. But, the US had $100,000 notes that were not HUGE. What gives?