Not much stretch, and no idea why that would be a needed measurement for this type of shirt. It conforms to the body as you move. The fabric rests well on the torso after only one washing, and it is very comfortable. I ordered two and am very satisfied with the fit, look, and apparent quality in it's manufacture. Buy a bunch, it's summer!(I have a 47" chest and ordered an XL. It is very roomy and comfortable. I might even try a Large next order.)
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