Christian Dior Blazer Sport Coat Suit Jacket - Men’s Measurements in description

This is a suit jacket from Christian Dior Monsieur. 100% pure virgin wool in a subtle plaid. There is no size inside, the jacket measures approx. 25" from the top of the shoulder down, approx. 17" across the shoulders, approx. 21.5" across the back at the underarms, and approx. 30.5" from the back of the neck to the hem. I think those measurements make it a Large, although it could possibly be a Medium, I suppose - let me know if that's wrong. Two-button front, four-button sleeve. Feel free to ask questions. Sorry, no shipping Saturdays.