Brazilian Rosewood set 11 - $400
Back: 16" x 21 1/2" x .125 (sanded)
Sides: 3 7/8" x 33 1/4' x .087 (sanded)

The back pieces in this set are matched and well quartered but oddly colored, the middle piece has some cracks (marked in orange on the detail image) but these can be easily avoided. The sides are quite narrow.

 

---