Do you know exact size of currencies in your wallet? Look, it can be useful to measure quickly something or somebody with some acceptable accuracy:
The size of the United States one-dollar bill (the most common denomination of U.S. currency) is approximately 6.14 x 2.61 in = 155.956 x 66.294 mm.
One dollar facts:
The first president, George Washington, painted by Gilbert Stuart, is currently featured on the obverse, while the Great Seal of the United States is featured on the reverse. The one-dollar bill has the second oldest design of all U.S. currency currently being produced, after the two-dollar bill. The obverse debuted in 1963 when the $1 bill first became a Federal Reserve Note. The Bureau of Engraving and Printing says the average life of a $1 bill in circulation is 21 months before it is replaced due to wear. Approximately 45% of all U.S. currency produced today are one-dollar bills. All $1 bills produced today are Federal Reserve Notes. One-dollar bills are delivered by Federal Reserve Banks in blue straps. The inclusion of "In God We Trust" on all currency was required by law in 1955. The national motto first appeared on paper money in 1957.