Last summer I replaced the brake linings of my 1927 1 ton truck.
It takes 3/16 inch thick woven brake lining. 1/4 inch thick linings will not work. I tried that and they did not leave enough room for the brake drum. $$ down the drain.
For the service brake (outside band), the dimensions are 2 inches wide by 38 1/2 inches long.
For the emergency brake (inside band), the dimensions are 1 11/16 inches wide by 36 1/4 inches long.
My spare wheels are buried in storage at the moment, so I cannot measure the drum for you.
Cheers, Dean