Zenana Outfitters Women's Stripe Sleeveless Mock Turtleneck Tank Top 5% spandex Soft Material 60% Cotton 35% Polyester 5% Spandex Junior Sizing: Small measures 14" from right to left underarm unstretched, Medium-measures 15" from right to left underarm unstretched, Large-measures 16" from right to left underarm unstretched, 16" long from underarm to bottom of hem.