LegendSize

LegendSize
is an option for Legend which specifies the size of a legend box.

To use LegendSize, you first need to load the Plot Legends Package using Needs["PlotLegends`"].

	Automatic	automatically determine the size of the box
	number	scale the size
	{xlength,ylength}	use xlength and ylength to determine the size

Using setting number scales the size so that it fits in a box with a width equal to the longest side of the length given.

Needs["PlotLegends`"]

Normal-sized box for the legend: