NWT Halogen Striped Long Sleeve Tee Sz XXL Size info True to size. XXS=00, XS=0-2, S=4-6, M=8-10, L=12-14, XL=16-18 (16W), XXL=20-22 (18W-20W). Details & care Cut from a tissue-weight stretch Tencel® modal with a soft and silky feel, a slim tee comes in a choice of rich shades. 27" length (size Medium) Semi-sheer; base layer recommended Long sleeves Crewneck 95% modal, 5% spandex Machine wash cold, dry flat Measurements (when laying flat) Armpit to armpit: 20" Length (top of shoulder to bottom hem): 30"