This is a super-cool OLD Hercules brand work apron. I didn’t realize Sears made Hercules clothing- I learn something new all the time even after selling vintage for years!
 
Made of blue & white cotton woven hickory stripe twill (like railroad stripe but not as wide) it has 2 small pockets at the chest and 2 larger patch pockets at each hip. The old Union Made Hercules label is at the top chest edge. Top and bottom edges have been hemmed; the long side edges are solid white selvedges. Off-white twill tape straps are sewn on at the bib, then crisscross in back and feed thru grommet at each side to tie at the center back. Super nice apron; I'd keep it but it's too long for me. 
 
Pre-owned, genuine vintage workwear, it’s been laundered.
 
The actual apron measurements are-
Center front length- 42”  
Waist- 28 1/2” between selvedges