A:Answer Swivels left to right, tilts forward/backward. Depending where you place the TV on the Mount (measured with a 55" TV) 63 inches high.
From second shelf to first shelf 7 1/4" between; from second shelf to third shelf 8" between. Length: 1st shelf 40", 2nd shelf 44", third shelf 48". Width 15", 16" third shelf 18 1/2".