• Size Small (3 1/2 in at base): Choose this size if you are smaller than an A cup and want to increase to B Cup size
• Size Medium (3 7/8 in at base): Choose this size if you are a B Cup and want to increase to C Cup size
• Size Large (4 7/8 in at base): Choose this size if you are a C Cup and want to increase to D Cup size
• Size X-Large (5 3/4 in at base): Choose this size if you are a D Cup and want to increase to DD Cup size

NOTE: This product does not include a hand pump or hose! Most standard pumps include the hose.