Eagle tattoos can be full body, or just a smaller one. Eagles tattoo designs is popular in the army too, because the army's animal is the eagle, and it's also a memorial symbol of the soliders
Eagles could symbolize freedom, (as a lot of bird type of tattoo).
Eagles could symbolize strenght, precision, decisive action, and in quick attack, and these designs often cames with some banners, with quotes.
Although, the eagles are popular in many other cultures too, for example in the greek and aztec culture too.These cultures thought the symbol of the eagle give them courage and pride.
The greek eagle tatto is referring to the God of the Sun, the greek though all the eagles linked to that god.
Some standard design of eagle: