The White House released photos of its delivery, and this isn't just any ordinary letter.
Others wondered, will Trump reciprocate with an equally large letter? At what point does something stop being an envelope and start becoming a paper bag?
As for what this giant letter contained, well, we don't know just yet.
Right after his meeting Friday with Kim Yong Chol, President Trump told reporters he had not yet read the letter. But a White House official has since confirmed that the President has read the contents of that giant envelope.
The letter was "carefully examined" by the Secret Service for anything potentially dangerous before the North Korean official was able to deliver it, according to a White House official.