The Iowa State women take on Vanderbilt tomorrow night in Denver in the semifinal round of the Midwest regional. The Cyclones are making their third straight appearance in the sweet-16 after downing Howard and Florida State last weekend in Ames. To make the next step, Cyclone coach Bill Fennelly says his team will have to overcome a size disadvantage.Fennelly hopes the Cyclones size disadvantage will make them harder for Vanderbilt to guard, as they may be faster and quicker.Fennelly says rebounding will be the key and offensive rebounds by Vanderbilt will lead to Cyclone fouls.The winner will play the winner of the game between Notre Dame and Utah on Monday for the right to advance to the Final Four.