Men\'s UA Tech™ is Under Armour \'s original go-to training gear: loose, light, and it keeps you cool. It\'s that same great fabric, but this shirt has also been updated with a new, more streamlined fit and a shaped hem. It\'s everything you need. HOW TO MEASURE CHEST: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement. WAIST: Measure around your natural waistline—right above your hips. Be careful not to squeeze too tight to allow a little give. TALL: All tall sizes are 5 cm longer than regular sizes and are marked with a T behind the size SHORT: All short sizes are 5 cm shorter than regular sizes and are marked with a S behind the size SIZE CHART Chest (cm) Waist (cm) XS 76 - 81 67 - 70 S 86.4 - 91.4 71.1 - 73.7 M 96.5 - 101.6 76.2 - 81.3 L 106.7 - 111.8 86.4 - 91.4 XL 116.8 - 121.9 96.5 - 101.6 XXL 127 - 132.1 106.7 - 111.8