I used to coach track, and I like to tell folks that a hectare is visualized an a square 100 m on a side. And when they ask (duh) how long 100 m is, I tell them it is the length of a 100 m dash in a high school track event, or 1/4 the way around a running track.
It is nice to see that in Latin American countries, even those with zillions of US tourists, real estate is sold by the hectare-- or at least usually. HARRY
