The size in the listing title and item specifics are reflective of approximately what the shirt fits like in modern unisex t-shirt sizing. You should always compare the provided measurements to those of a shirt that you own that fits you well to ensure a proper fit. The original vintage tag is provided only for reference and should generally be presumed to be incorrect. All measurements are taken with item laying flat. First Measurement Photo is Width is Pit to Pit. Second Measurement Photo is Length Top of Back Collar to Bottom of Shirt. Please refer to all photos for any condition details/flaws. All vintage items should be considered pre-owned/used unless noted as deadstock or NOS. All major flaws will be noted and photographed accurately. But as with all used clothing, some minor wear and/or flaws should be expected.