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A much-anticipated summit between US President Donald Trump and Kim Jong Un is back on... after the North Korean leader sent a huge letter to the White House.

Pictures have emerged of the strangely large envelope, hand-delivered to the president by a senior North Korean messenger on Friday

Official images released by the White House showed the document was nearly as large as a folded newspaper.

And the "comically" sized envelope sparked wild speculation online as to its contents, and possible meaning.

People on social media were quick to point out that Kim's big letter made Mr Trump's hands look small - suggesting that Kim might have been trying to mock the president.

But analysts said it was simply part of meticulous steps taken by North Korea to present Kim as a legitimate international statesman.

The president announced on Friday that a June 12 summit with Kim will go ahead, just one week after he called it off.

Speaking after an Oval Office meeting with North Korea's Kim Yong Chol, Mr Trump said he would be making a mistake not to go forward with the on-again, off-again nuclear summit.

It followed an hour-long meeting with the most senior North Korean to visit the White House in 18 years, which the president said "went very well".

"We're going to deal, and we're going to really start a process," Mr Trump told reporters.

The president was also presented with a letter from Kim during the meeting.

And pictures of the letter's delivery led to speculation over its meaning.

Some wondered whether the size of the envelope was designed to Mr Trump's hands look small.

While others wondered if the president would respond with an equally large sized letter.

And others pointed out that the photos seemed rather surreal.

But the giant letter's contents remain unknown.

The president had not yet read the letter when he spoke to reporters on Friday.

He said: "I may be in for a big surprise, folks."

Minutes earlier, he had described the note as "a very interesting letter".

Later on Friday, deputy White House press secretary Hogan Gidley confirmed that Mr Trump had read the letter, but he did not reveal its contents.

The summit is set to be held in Singapore.