The David is a statue out of marble that was sculpted by Michelangelo. It was made out of a flawed piece of marble that no one could figure out what to do with, now the David is one of the most famous sculptures in the world.
The David has so much detail that you can see his veins
Here is the David in Galleria dell'Accademia the mueseum where the David is.
This is how large it really is.