Lululemon Run For Days Short Sleeve Size: 4-6 / small (based off measurements) 18 inches pit to pit // 23 inches long Color: Regal Plum Silverescent® technology, powered by X-STATIC®, inhibits the growth of odour-causing bacteria on the shirt Light Luxtreme® fabric sleeves are sweat-wicking and four-way stretch lightweight Mesh fabric body lets your skin breathe LYCRA® fibres add great shape retention reflective details add visibility slim fit, hip length