This is the Cabin Long Sleeve Tee II Greys Ombre Stripes/Heathered Blurred Grey by Lululemon. The size tag is missing but this was purchased as a size 12 and measures 29.5” in length, armpit to armpit is 19.5”. It’s reversible and it has thumbholes. There are small Rips near the thumb holes as shown. This tee is in otherwise good condition! Thanks for looking!!