Amazon Essentials Long Sleeve Rash Guard Swim Shirt Gray with White Stitching. Size XS. 100% Polyester. In excellent used condition. While flat: Armpit to armpit is about 21” Shoulder to hem is about 25” *Colors may look different in photos due to lighting Athletic Basic Classic Unisex Modern Beach Nautical Resort Vacation Summer Spring Workout Swim Ocean Hiking Fall Outdoors Sun SPF Modest Protective