This is a gorgeous sweater from Brooks Brothers.

This beautiful sweater is in absolutely MINT condition.  Looks and feels unworn. It's guaranteed to be authentic and perfect.

Marked S. 

  Across the back, laid flat and unstretched, the sweater measures 21 inches from armpit to armpit, and 26 inches from the collar seam to the bottom of the back. The sleeves measure 34/35 inches from mid-collar to the end of the cuffs.