The mockeries flooding social media span doctored versions of official photos, magazine covers and recent news coverage. They show a shrunken Mr Trump next to landmarks and other people including Barack Obama, Hillary Clinton and Canadian Prime Minister Justin Trudeau.
Mr Trump has not yet responded to the taunts.
Most of the images can be seen on this trending subreddit. Its moderator, posting as revolution486, wrote: "I'm really excited to get Trump to respond to the meme."
But one commenter wrote: "I don't get what's funny about it. Tiny hands was good but this is just idiotic."