Patagonia Sleeveless Muscle Tank Top Shirt Cobalt Blue Mens Sz ? See measuremnts

This Sleeveless Tank Top is made by Patagonia. It is a sleeveless Muscle Shirt style. It reads "Patagonia" on the back of the shirt. It is cobalt blue and the material feels a little satin. The Size tag is missing so please.... ***Please see my measurements below to help insure a proper fit*** MY MEASUREMENTS Length of shirt 24 inches Chest 20 inches (measured flat armpit to armpit so 40 inches around) **See pictures of my measurements**