Big Sam is actually named A Tribute to Courage by David Adickes. Sam is 67 feet tall, made from 30 tons of concrete and steel and stands on a 10 foot sunset granite base. That makes him the world's tallest statue of an American hero. Although comparatively, he really isn't that tall. Not counting its pedestal and foundation, the Statue of Liberty is 151 feet tall - taller than two Big Sam's standing on top of each other. Still, its an impressive site. Big Sam can be seen for 6.5 miles from the south.
For those unfamiliar with American or Texas history, Sam Houston was an important figure during the Civil War. He was opposed to Texas seceding from the Union and was removed as governor when Texas did secede and he refused to swear and oath of allegiance to the Confederacy. He was a leader of the Texas Revolution and eventually supported the annexation of Texas into the United States. Some interesting things to know about him include that he was the only man in American History to be elected governor of two states (Tennessee and Texas) and he was a citizen of four nations (United States, Cherokee, Mexico, Texas.)
A Tribute to Courage was originally intended to be finished by March 2, 1993 for Sam Houston's 200th birthday. But the colossal nature of the project took longer to complete then expected so the final statue was not dedicated until 1994. Given the sheer size of the honor, I doubt Sam Houston minded the extra time needed.