Lululemon Men Surge Warm 1/2 Zip Raven Stripe Black Heathered Black Athletic No size tag, please see measurements below. I am guessing around a size Large Approximate Measurements Laying flat: armpit to armpit 22 in. length 26 in. sleeves 27 in. Why we made this Just because the weather's cooler doesn't mean you stop exercising outdoors, it just means you've got to gear up a bit. This shirt was designed to help keep the chill off during cold-weather workouts, made from sweat-wicking fabric so you can play outside a bit longer. Key features sweat-wicking Rulu™ fabric is four-way stretch LYCRA® fibre adds stretch and shape retention hidden thumb loops help keep your sleeves down under layers reflective details help keep you visible in low light imported