100% Cotton Ribbed cuffs and hem Embroidered branding Please refer to the size chart for accurate measurements How to Measure Yourself Shoulder: Measure from shoulder tip to shoulder tip across the back. Pit to Pit: Measure from one armpit to the other across the fullest part of your chest. Sleeve: Measure from the shoulder seam to the end of the sleeve. Back: Measure from the base of the neck to the bottom of the garment. Size Chart Size S M L XL Shoulder (in/cm) 18 1/2" / 47 cm 19 1/2" / 49.5 cm 20 1/2" / 52 cm 21 1/2" / 54.5 cm Pit to Pit (in/cm) 17" / 43 cm 18" / 45.5 cm 19" / 48 cm 20" / 50.5 cm Sleeve (in/cm) 16" / 40.6 cm 16 3/4" / 42.5 cm 17 1/2" / 44.5 cm 18 1/4" / 46.4 cm Back (in/cm) 19 1/2" / 49.5 cm 21" / 53.3 cm 22 1/2" / 57.1 cm 24" / 61 cm