Each is about 16mm tall or so, so certainly not as large the other Landmark buildings in the set - but each player does get 20 of them - 5 in each colour - to play with.
Here are some shots of the casts from the game - these are not painted, but cast in various colours of plastic; shown below are the Farms and Armouries:
...and the Markets and Houses:
...and here are some snaps of the original sculpts, created in polymer clay:
An aerial view showing them among the Landmark builds:
More pics posted soon.