SWAROVSKI ELEMENTS 4mm 5601 cube bead. These crystal beads have bevelled edges which adds to the number of sparkly facets. They are available in 8 different colours. The hole size is approximately 0.8mm. These 4mm Swarovski crystal beads provide classical elegance to bracelet and earring designs. To give an idea of the difference between the sizes please see the additional image showing all the sizes photographed together. Tanzanite is a deep bluish lilac transparent purple.