The SWAROVSKI ELEMENTS #2028/2058 Xilion rhinestones are available below in SS20 (approx 4.7mm).  SS16 is one of the most popular sizes of SWAROVSKI ELEMENTS rhinestones. These round flatback rhinestones are loose crystal components with Platinum foiling on the back. Size SS20 #2028/2058 rhinestones are available in a large range of colors.