I purchased the Stampin' Up ink pad tower when I began squiring my supply of ink pads. I joined an ink club and got all the inks and they fit perfectly in the tower. Then I decided I needed more and joined up again! This gave me the chance to get the extension for my tower. I have it completely filled and still do not have enough room for my inks. This is the best organizational tool for inks by far though. However, it does not turn as it should due to the weight (Stampin' Up really needs to do something about that), so I bought a Lazy Susan and put my ink holder on it. Turns like magic now. Thanks to Jennifer at Savvy Scissors for that great idea!