AKA 1901 Brand Pink Green & White striped L/S Tshirt in size Small/Med

AKA- Pink, Green & White striped long sleeve tshirt made by 1901 Brand. This tshirt tab/label has size large but its definitely more comfortable on a size small to medium (in my opinion). Laying flat Measurements are 18' armpit to armpit and 24' top of the shoulder to the bottom hem. I purchased this shirt from an online seller & it didn't fit me. There is a small unnoticeable spot on 1-rear arm but it is hard to spot as seen in pic.