These are vintage Lee bib overalls which are branded as made in the USA.  They are weathered and distressed, especially at the bottom of the legs. There are a couple of spots which look like paint. The size is not marked but the actual measurements are listed below.  Please check them carefully to be sure of fit.  

INSEAM: 31"

RISE: 11"

WAIST: 28" as measured around the band below the bib