100% AUTHENTIC. MEASUREMENTS ARE AS FOLLOWS: ARMPIT TO ARMPIT WIDTH IS 13 1/2" INCHES AND TOP COLLAR TO BOTTOM SEAM IS 18" INCHES. SHIRT IS IN CRISP/CLEAN MINT PRE-OWNED CONDITION. ZERO TEARS, FADING, DEFECTS, ODORS, OR STAINS! EXTREMELY LOW WEAR. SMOKE/PET FREE HOME. SEE PHOTOS AND CLICK "ZOOM" FOR A CLOSER LOOK. CHECK OUT MY FEEDBACK AND THEN BUY WITH THE UPMOST CONFIDENCE. ITEM SHIPS WELL PROTECTED USPS GROUND ADVANTAGE WITH TRACKING WITHIN 24 HOURS OR LESS AFTER PAYMENT IS MADE. THANKS, TIM