Men’s Suit Jacket

Previously worn lightweight suit jacket with full lining. Three inside pockets, two outside pockets. One button at the end of each sleeve. Two vents/slits in the back. No size given!! Seam shoulder to seam shoulder measures: 18 inches. My husband always wore a 40R ( when he was young... lol) so he believes it to be. Let me know what you need me to measure and I’d be happy to. Multi-colored fine pin strips (orangish/ burgundy) with a grayish/blue body. The jacket is in very good condition.