According to Captain Mercer, the following describes Washington when he took his seat in the House of Burgesses in 1759:
He is as straight as an Indian, measuring six feet two inches in his stockings, and weighing one hundred and seventy-five pounds. His head is well shaped, though not large, and is gracefully poised on a superb neck, with a large, and straight rather than prominent nose; blue-gray penetrating eyes, which are widely separated and overhung by heavy brows. A pleasing, benevolent, though commanding countenance, dark-brown hair, features regular and placid, with all the muscles under control, with a large mouth, generally firmly closed.
Houdon's bust accords with this description.