Width :  (noun)

1: the extent of something from side to side [syn: breadth]

ambit, amplitude, area, beam, bigness, body, breadth, broadness, bulk, caliber, circle, compass, coverage, depth, diameter, dimension, dimensions, distance across, expanse, expansion, extension, extent, fullness, gauge, girth, greatness, height, largeness, latitude, length, magnitude, mass, measure, measurement, orbit, panorama, proportion, proportions, radius, range, reach, scale, scope, size, span, spread, volume, wideness,