This Collings single O measures 13.5 inches in width (smaller than your typical classical guitar) but the Collings 0 has tone and volume that belies its first impression as being less than full-sized. This particular guitar has the Collings "style-1" sunbrurst finish and a 1 3/4 nut width.
$3870 More information about this guitar here:
Collings O1 Sunburst