The Dragon spacecraft launching today will be the seventh to reach the International Space Station. That includes the first flight test mission which did not carry supplies but proved the unpiloted system could work. With that accomplished, Dragon began making operational resupply flights to the orbiting laboratory. CRS-6, launching today, would be the sixth of those flights.
The spacecraft itself is 14.4 feet tall and 12 feet in diameter. The trunk, which supports the Dragon’s twin solar arrays, is 9.2 feet tall.