100% Ring Spun (Pre-Shrunk) Cotton. Made with ultra soft and comfortable fabric for maximum breathability as well as it being soft against the skin. The fit of this garment is a fashionable athletic fit. Machine Wash Cold (inside-out), Hang Dry for Best Long-Term Care, PLEASE NOTE: Drying this garment with heat in a dryer can cause some shrinkage due to cotton being a natural fiber that can tend to tighten up with heat. Please be sure to check the size carefully. For best comparison, find a similar garment that you currently wear that you like how it fits on you. Then compare the measurements listed here to best match the desired sizing. — Small —: (Length) 26 in [66.04 cm], (Width from middle of garment) 17.25 in [43.82 cm], (Sleeve length relaxed) 7.25 [18.42 cm], (Sleeve opening diameter relaxed) 5.5 in [13.97 cm] — Medium —: (Length) 28 in [71.12 cm], (Width from middle of garment) 19.5 in [49.53 cm], (Sleeve length relaxed) 7.75 [19.69 cm], (Sleeve opening diameter relaxed) 6.25 in [15.88 cm] — Large —: (Length) 29.5 in [74.93 cm], (Width from middle of garment) 21 in [53.34 cm], (Sleeve length relaxed) 8.5 [21.59 cm], (Sleeve opening diameter relaxed) 6.5 in [16.51 cm] — X-Large —: (Length) 30 in [76.2 cm], (Width from middle of garment) 23.5 in [59.69 cm], (Sleeve length relaxed) 8.5 [21.59 cm], (Sleeve opening diameter relaxed) 6.5 in [16.51 cm] — XX-Large —: (Length) 32 in [81.28 cm], (Width from middle of garment) 25.25 in [64.14 cm], (Sleeve length relaxed) 9.75 [24.77 cm], (Sleeve opening diameter relaxed) 6.5 in [16.51 cm] — XXX-Large —: (Length) 32 in [81.28 cm], (Width from middle of garment) 27 in [68.58 cm], (Sleeve length relaxed) 9.75 [24.77 cm], (Sleeve opening diameter relaxed) 7.5 in [19.05 cm]