According to the U.S. Mint, a quarter weighs 5.670 grams or slightly more than 0.2 ounces. It's heavier than all coins of lesser value, but the half-dollar weighs twice as much.
A standard quarter is composed of 8.33 percent nickel, and the rest is copper. At only slightly less than 1 inch in diameter, it's larger than all coins of lesser value, but the half-dollar is 0.25 inches larger in diameter. With a value of 25 cents, the quarter is worth one-fourth of $1 and has been in circulation since 1796. The standard quarter features a bust of George Washington on the front, but special quarters honoring each state have been produced since 2010.