SWAROVSKI ELEMENTS 4mm 5328 XILION bead. The XILION Bead is the most popular bead shape that we sell, it replaces the 5301 Bicone bead which Swarovski have transformed into the new patented 5328 shape: It features 50% more facets for extra brilliance and light refraction, a smoother equator for increased comfort during wearing and rounded hole edges?to protect stringing materials. The hole size is approximately 0.9mm, they are available in an array of 96 different colours and effects. 5328 is also available in 3mm, 5mm, 6mm & 8mm. These 4mm Swarovski crystal beads are incredibly versatile which is probably why they are the most popular shape and size we sell. They work well in almost any project and are especially good in Japanese/right angle weave designs and for wrapping tiara bases. To give an idea of the difference between the sizes please see the additional image showing all the sizes photographed together.Crystal AB is crystal with a coating on one half that reflects light with a yellow and blue tinge, like the surface of a bubble. Also available in 3mm, 5mm, 6mm and 8mm.