breadth 
(brĕdth)
(brĕdth)n.
1. The measure or dimension from side to side; width.
2. A piece usually produced in a standard width: a breadth of canvas.
3.
a. Wide range or scope: breadth of knowledge.
b. Tolerance; broadmindedness: a jurist of great breadth and wisdom.
4. An effect of unified, encompassing vision in an artistic composition.
[Middle English bredth, breth, alteration (on the model of length, length) of brede, from Old English brǣd.]