Not wishing to start anything. 2016 figures from the World Health Organisation indicates American men are 3 inches taller on average today than the average height of 5'7" back in the early to mid 20th century. A 22-23 inch back at 5'7" to 5'9" is manageable, especially with high pants. I noticed in Sears period ads for half-belts from the 1940's-50's that they proudly advertise 25.5 inch standard back lengths. Again, at 5'7" to 5'10", that seems longer that I would have imagined. I think once you are six one or over the back length needs to leave behind off the rack period accuracy.