This is a gorgeous sweater from Zegna Sport.

Made of a fairly lightweight blend of cotton, cashmere, and silk, it's blue with gray trim on the inside neck.

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

Marked Size 5, which is a slimmish Extra Large. 

  Across the back, laid flat and unstretched, the sweater measures 23 inches from armpit to armpit, and 31 inches from the collar seam to the bottom of the back. The sleeves measure 39 inches from mid-collar to the end of the cuffs.