LAID FLAT, THE SHIRT MEASURES 16" ACROSS THE CHEST FROM UNDERARM TO UNDERARM AND 24.5" LONG FROM THE TOP OF THE SHOULDER TO THE BOTTOM HEM. THE SIZE TAG SAYS IT'S A LARGE BUT IT FITS MORE LIKE A MEN'S SMALL. IT'S MEANT TO BE WORN FITTED AND TIGHT CONSIDERING IT'S A THERMAL UNDERSHIRT.