Flowy Denim Blue Summer Top - Runs big

Lot of room in this Denim Blue top. I'm going to say that this runs big for a XL. Is roomy. Measures about 43" laying flat from armpit-to-armpit. Spaghetti straps. 97% Rayon, 2% Polyester, 1% Spandex. Machine wash, dry flat. No rips, tears or stains. May have some light pilling. Hard to tell based on the fabric.