It turns out most of cast of "The Hobbit: The Desolation of Smaug" are quite a bit taller than their dwarf characters ought to be in relation to elves and Laketowners.
For example, Thorin (Richard Armitage) and Dwalin (Graham McTavish) are both a towering 6-feet-2 in real life, while Gandalf (Ian MeKellen) is just 5-feet-11. Alas, those strolls through idyllic pastures on the way to Mirkwood wouldn't feel very believable if the dwarves were towering over their guiding wizard.
Scale doubles were used when you could see the dwarf next to a taller character. After auditioning, they joined the rest of the actors in the movement and fight training that has been dubbed "dwarf bootcamp."
Check out the cast with their nearly identical counterparts below: