Graydon Carter's background on the hand size joke is always hilarious to me. Excerpt, trimmed to be fair to the Vanity Fair post:

I took to referring to him as a “short-fingered vulgarian” in the pages of Spy magazine. ... To this day, I receive the occasional envelope from Trump. There is always a photo of him ... On all of them he has circled his hand in gold Sharpie ... The most recent offering arrived earlier this year ... this one included a circled hand and the words, “See, not so short!” I sent the picture back by return mail with a note attached, saying, “Actually, quite short.” Which I can only assume gave him fits.