Shop Buxom Cosmetics Buxom Lash Volumizing Mascara online at Macys.com. A bestselling, intensely volumizing mascara that separates and defines. Bigger is better. With this bestselling, volumizing mascara, you'll get big, outrageously full lashes with curves to spare. The vitamin-enriched, clump-resistant formula deepens, darkens and thickens lashes with rich black color while the hourglass-shaped brush evenly coats lashes from root to tip for perfect separation and definition.