How big would a cow be if each pixel on the screen represented 0.03 meters?
A "pixel" is a tiny dot on your screen. For reference, the scale on this page (the long horizontal line
which starts with "0e0 meters") is 1000 pixels wide.
A selection of objects are selected based on whether they fit on the page when scaled to the size
you specify. If you hover your mouse over each object you can see some basic information about that
object. Detailed information is listed at the bottom of the page.