If we don't know its true size we may compare it with nearby objects of known size.

Lacking an object of known size for comparison, there was no scale.

Now you need some sighting device of known size held at a known distance.

Some official government statistics for the period, including those reported on this page, do not seem consistent with the known size of the Kuomintang influx.

For objects of known size the range is the size divided by the angle.

But today was the first time that the team has measured a Soviet explosion of known size.

DNA standards of known size and fluorescence are included in the analysis as references.

From this position change, and the known size of the Earth's orbit, the distance to the star could be estimated.

A sphere of known size and density is allowed to descend through the liquid.