Map sizes are:
Duel: 40 x 25 (2 players, 4 city-states, 2 natural wonders)
Tiny: 56 x 36 (4 players, 8 city-states, 3 natural wonders)
Small: 66 x 42 (6 players, 12 city-states, 3 natural wonders)
Standard: 80 x 52 (8 players, 16 city-states, 4 natural wonders)
Large...