Swarovski Crystal Size ChartAll crystal bling kits come with the SS12 size Swarovski crystal rhinestones. The size you see below is the surface area of the back of the crystal. The front of each crystal is dome shaped - Swarovski's patented design called "Chaton (Xilion Rose)". SS7 size crystal rhinestones can be purchased here. They are very useful for intricate design work and for filling in small spaces left over from using larger stones.