The gold stored in the Depository at Ft. Knox is in the form of standard mint bars of almost pure gold or coin gold bars resulting from the melting of gold coins. These bars are about the size of an ordinary building brick, but are somewhat smaller. The approximate dimensions are 7 x 3-5/8 x 1-3/4 inches. The fine gold bars contain approximately 400 troy ounces of gold. The avoirdupois weight of the bars is about 27-1/2 pounds. They are stored in the vault compartments without wrappings.
I'm just guessing, but the ingots in the photos look longer than 7 inches long to me.