Miyuki 3mm. Cubes are a medium sized crisp edged cube. They are a great foil for other shaped beads as they create a smooth flush surface when worked as Peyote Stitch brick stitch or Square stitch. They also create a fairly rigid base on which to add other beads and crystals. 3mm. Cubes can often replace 4mm. Cubes in many patterns to make daintier versions of your favourite beaded pieces. 3mm. Cubes are sold in packs of 12.5 grammes which equates to around 250 beads depending on the bead finish. You can expect to find a proportion of your cubes misshapen, however, these are absolutely great when used in Asymmetric pieces, Bead Embroidery, Wire and Bead Jewellery and Freeform pieces!