Use the CakeSafe Acrylic Disks to achieve perfectly crisp edges on each tier. Each disk is also etched with a size marking and line around the edge to help you center your tier. This set of Disks contains two 10.5” Acrylic Disks. The .5” perimeter sizing is most commonly used by bakers who make all buttercream cakes and do not plan to cover their cakes with fondant.