The newest addition to the Czech line of glass beads in the Diamonduo. They feature two parallel holes which are great for bead weaving and multiple thread passes.  They have a flat smooth back that allows them to sit flush with any surface. 

Measurements: 8mm long, 5mm wide, and 3.5mm at the thickest point. The two holes are 4mm apart (center to center), and will accommodate wire or thread up to 20 gauge (0.812mm) thick.