Overalls Salopette Denim BIG SMITH Vintage 60s 70s Condition: Used Paint marks, a few small holes on the back of the left leg. Size: Total length: 147cm Inseam: 116cm Waist: 45cm x 2 Width at thigh: 31cm Vintage design source from the American heritage workwear brand, BIG SMITH. BIG SMITH is an American heritage workwear brand founded in 1916. Even in the vintage market, coveralls are popular, and it's a well-known brand.