[The size of the Federal Reserve's balance sheet has dropped to around $7.1 trillion, and it has shrunk by $1.39 trillion this year] On September 22, according to data from the Federal Reserve's official website, as of September 17, the size of the Federal Reserve's balance sheet had dropped to around $7.1 trillion, now at $7.109 trillion. The cumulative shrinkage so far this year is about $1.39 trillion.