48 million: 8000x6000, 30 million: 6400x4800, 24 million: 5600x4200, 20 million: 5200x3900, 18 million: 4896x3672, 16 million: 4608x3456, 12 million: 4000x3000, 8 million: 3264x2448, 7 million: 3072x2304, 5 million: 2592x1944, 2 million: 1600x1200.
eBay