On a similar scale to Christ are John the Baptist on the left, and on the right Saint Peter, holding the keys of Heaven and Saint Bartholomew with his own skin which is usually recognized as being a self-portrait of Michelangelo.
On a similar scale to Christ are John the Baptist on the left, and on the right Saint Peter, holding the keys of Heaven and perhaps offering them back to Christ, as they will no longer be needed. The face on this is usually recognized as being a self-portrait of Michelangelo.