The Ross Topcoat by Isaia is the quintessential big-boy coat that’s big on understated elegance. This single breasted three-button jacket is constructed with a center vent and is cut in a classic fit. If you’re planning on wearing a suit jacket underneath primarily, you should buy your regular size. However, if you plan to wear more casually — sans sport coat — you could probably size down one size for a trimmer fit. Made in Italy.