Donald Trump Hands: British Prime Minisiter Theresa May Cracks Joke About US President's Great Insecurity, His Hand Size

British Prime Minister Theresa May tried out her comedy chops on Monday with a subtle dig at a sore spot for President Donald Trump: the size of his hands.

“Thank you very much for that wonderful reception,” May said at the Black and White Ball, an annual political fundraiser. “I don’t think I have received such a big hand since I walked down the colonnade at the White House.”

The two world leaders were photographed walking hand-in-hand during May’s visit to the U.S. in January. British tabloid The Sun reported Trump and May held hands because the U.S. president had a fear of stairs and slopes. However, the Independent described the rumor as "outlandish," claiming Trump offered his hand to May in an act of chivalry.

This isn't the first time Trump's hand size has been the source of mockery.

During a nasty Republican primary election, Trump described Sen. Marco Rubio of Florida as "Little Marco," prompting Rubio to follow suit by publicly referencing Trump's perceived small hands.

"Have you seen his hands? And you know what they say about guys with small hands?" Rubio said in February 2016, implying that Trump’s small body parts were not limited to his hands. He paused as the audience laughed and then added, "You can't trust 'em!"

Trump’s insecurity about his hand size can be traced back to 1988. Graydon Carter — now editor at Vanity Fair, then editor of the satirical "Spy Magazine" — referred to the real estate mogul as a “short-fingered vulgarian.” The comment was meant “just to drive him a little crazy,” Carter wrote in Vanity Fair in November 2015.

“To this day, I receive the occasional envelope from Trump. There is always a photo of him—generally a tear sheet from a magazine. On all of them he has circled his hand in gold Sharpie in a valiant effort to highlight the length of his fingers. I almost feel sorry for the poor fellow because, to me, the fingers still look abnormally stubby,” Carter wrote.

Carter said he received the most recent letter in early 2015 before Trump announced his decision to run for president.

Trump continued to mention the size of his hands during his presidential run, too.

"Those hands can hit a golf ball 285 yards,” Trump said at a rally outside of Detroit in March.

He brought up the topic again later that day during a primary debate.

"Look at those hands,” he said. "Are they small hands? And he referred to my hands -- if they are small, something else must be small. I guarantee you there is no problem. I guarantee you."