(1 of 1) MID Maize/Navy Polo - SMALLPush it to the limit in this performance polo that has plenty of stretch for movement. 5. 6 ounce, 58 38 4 cotton poly spandex jersey with stay cool wicking technology HOW TO MEASURE CHEST WIDTH Measure under the arm and around the fullest part of the chest with arms down, keeping tape horizontal. SIZE CHART XS S M L XL 2XL 3XL 4XL Chest 32 34 35 37 38 40 41 43 44 46 47 49 50 53 54 57