Size: 6-8mm (47 - 50 beads)
         8-10mm (38 - 40 beads)

Beads hole size: 6-8mm approx 0.8mm - 1mm
                             8-10mm approx 1mm - 1.2mm

Beads sizes do vary between different gemstones or even batches for the same gemstone. 
Beads colors do vary between different gemstones or even batches for the same gemstone. 
Please note that there could be a variation of up to 1mm - 1.5mm in size.