Zenana Outfitters Solid Sleeveless Mock Turtleneck Tank Top 95% rayon Soft material 95% Rayon 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, 17" long from underarm to bottom of hem.