Blue Czech Wood Square Cube Beads 5mm x 5mm Czech wood square cube beads available in a rainbow of bright colors and natural wood finishes. 5mm Czech wood square cubes are lightweight enough earrings, yet bold enough for necklaces. Czech wood beads have a 1-2mm hole, ideal for stringing on hemp, waxed cotton cord and leather. Beads are packed loose, ready to use in a convenient pack of approximately 100 beads. Size and pack specifications: Beads are 5mm in diameter (just under one quarter of an inch).