Vintage 1970s "Blue Bar" St. Louis Cardinals Jersey - Stan Musial #6
A rare, true vintage 1970s St. Louis Cardinals button-down baseball jersey manufactured by Champion Sportswear. 
This piece features the highly collectible vintage "Blue Bar" neck tag, Made in the USA.
It  features classic cream/off-white colorway with bold red piping, stitched /screen-printed interlocking "STL" chest logo, iconic #6 printed on the back, honoring Hall of Famer Stan "The Man" Musial and left sleeve features the classic 1967-1997 circular St. Louis Cardinals bird logo.
This shirt is in good condition with some mild signs of wear to fabric and light discolouration. No major stains, holes, or significant cracking on the graphics.
Measurements
I would estimate this sweatshirt to best fit a Men’s S or Women’s S or M but please check measurements given below: 
Labelled a vintage size M.
Pit to pit 20.5”
Length 29”
Shoulder to Shoulder 16”