How big is an acre?

As wildfires rage across Southern California, news media regularly report the sizes of the largest and most damaging fires in the region using acres as the unit of measurement.  But exactly how big is an acre?  While listening to the ongoing coverage of this current wave of fires, we at Geospatial @ UCLA became curious about how well people understand units of area -- specifically, to what accuracy can people who are constantly exposed to land areas expressed in acres actually identify an acre of land?

How accurately can you identify an acre of land?

Draw a rectangle on the map that you think corresponds to one acre of land.

The UCLA campus is shown by default, but you may use the search box at the top right corner of the map to choose a location more familiar to you.

When you are done drawing, click the button that will appear below the map to see your accuracy.