Giant

Giants are over-sized mobs that are identical to zombies. They currently have no purpose other than decoration.

Drops
Giants drop 5 experience when killed.

Spawning
Giants do not spawn naturally, as they require a light level greater than 11 and less than 8.

Commands
Giants can be spawned using the command.

Behavior
Giants are hostile, living mobs. They are twelve blocks tall and use a six times enlarged zombie model.In 1.8 Release, Giants' AI was removed though they still have animations and other mobs can interact with them.

Giants are living mobs, despite having the appearance of being undead.

Giants are in the Xbox 360 Edition, although they require external modifications for their egg to be placed in the player's inventory.

Trivia

 * Since giants need to have a light level both less than 8 and greater than 11 to spawn, they don't spawn from monster spawners. However, this spawn condition can be bypassed with a custom spawner, if it attempts to spawn an entity with valid spawn conditions riding a giant.
 * If you name a giant using a name tag, its name will appear inside its head.