In the case of bilateral treaties, ratification is usually accomplished by exchanging the requisite instruments, while in the case of multilateral treaties the usual procedure is for the depositary to collect the ratifications of all states, keeping all parties informed of the situation.
Trump does indeed have hands just below average size, particularly for a man standing 6-foot-2. According to various human anatomy websites, the average-height American adult male (5-foot-10) has an average hand size (measured from the tip of the middle finger to the wrist) of 7.44 inches. Trump's measures 7.25 inches. (His shoe size, incidentally, is reportedly 12, but THR editors have so far been unable to locate a Trump footprint).
The average shoe size for men in China is a size 8. Women in China average a size 5.5 foot. United Kingdom men have a size 9.5 foot and women have a size 7. Men in Canada appear to have slightly larger feet than those in the U.S., and the average shoe size in that country is a size 10. Women in Canada average a size 6.5 shoe. Shoe size is determined by the length and width of the foot.