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 6".5” Heart Shape Clear ¼” 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.