http://www.ebay.com/itm/271403726079
This vintage Mackinaw coat was made in the 1930s by Tru Val Outerwear. It is double breasted, made of a muted plaid mackinaw fabric. It has a belted back, with fancy pleats, handwarmer and flapped pockets. As is typical of these early mackinaw coats, it is unlined.

Chest (pit to pit): 24″ (doubled = 48″)
Shoulder to shoulder: 20″
Sleeve (shoulder to cuff): 23-1/2″
Length (base of collar to hem): 29″