Cozy sweats in our core weight. 7.8-ounce, 50/50 cotton/poly fleece Air jet yarn for a soft, pill-resistant finish Product Measurements XS S M L XL Chest Width 14 16 17 18 20 Sleeve Length 21 5/8 24 5/8 27 5/8 30 1/4 30 5/8 Body Length at Back 18 20 1/2 23 25 26 1/2 Chest Width Measured across the chest one inch below armhole when laid flat. Sleeve Length Start at center of neck and measure down shoulder, down sleeve to hem. Body Length at Back Measured from high point shoulder to finished hem at back.