SEE ALL PHOTOS FOR MEASUREMENTS AND MINOR SNAGS AND RUNS. The Vtg Mr. Jan Disco Short Sleeve Poly Shirt is a vintage piece from the 1970s, featuring a classic button-front style in white polyester knit fabric. This size large shirt has a chest size of 44 inches and a shoulder to shoulder measurement of 18.5 inches, with a lightweight feel and a disco-inspired look. Made in the United States by the Mr. Jan brand, this shirt is a unique piece of men's vintage clothing that measures more like a medium size. Perfect for those who appreciate retro fashion and want to add a touch of disco flair to their wardrobe.