SB Tech training, big and tall, cool play 3XL Navy blue long sleeve shirt #athletic #activewear #comfy From armpit to armpit it matters 33 inches. From the back of the neck to the bottom, it measures 29 1/2 inches. From armpit to the end of the sleeve it measures 21 1/2 inches. Non-smoking home. Our ship orders twice a day. I list numerous items daily.