findthem3862 Mens Body Shaper Posture Humpback Correction Firm Chest Tees Shirt Buster S: 4"11 to 5"1 inches, 66 to 100 pounds/ M: 5"1 to 6"11 inches, 101 to 130 pounds/ L: 5"1 to 6"11 inches, 131 to 160 pounds/ XL: 5"1 to 6"11 inches, 161 to 190 pounds This true micro fiber compression V-neck undershirt will forever change the way you look and feel in your clothes. Soft, comfortable and powerful Firms chest, flattens stomach, improves posture, supports lower back Almost No bulk under clothes