This is an original 1970's vest with a leather front and a knit back. It has leather ties in the front. Measurements were without any stretching of the back knitted area.
There is a slight mark, line looking on the front bottom, but it's super minor- it's in the 6th picture but you can't really see it. Please see all pictures
Armpit to armpit: 18" (across the front with 1" between the ties)
Length: 24" (back collar to the bottom)