This sweater vest is firm and stretchy for a comfortable fit, made with a blend of polyester and wool to keep it both lightweight and warm. Its versatile design is easy to layer over a long sleeve t-shirt or a turtleneck, with just the right thickness to keep its structure. It is washable and easy to care for at home for convenience. Item Size Chart Size Chest Width Shoulder Width Length Hem Circumference XS 19.7" (50.0 cm) 16.5" (42.0 cm) 26.4" (67.0 cm) 36.2" (92.0 cm) S 20.7" (52.5 cm) 16.9" (43.0 cm) 27.2" (69.0 cm) 38.2" (97.0 cm) M 21.7" (55.0 cm) 17.7" (45.0 cm) 28.0" (71.0 cm) 40.2" (102.0 cm) L 23.2" (59.0 cm) 18.5" (47.0 cm) 28.7" (73.0 cm) 43.3" (110.0 cm) XL 24.8" (63.0 cm) 19.3" (49.0 cm) 29.5" (75.0 cm) 46.5" (118.0 cm) *Size chart for reference only. Actual size might differ slightly due to the feature of the fabric.