0.5mm diameter with large 1.6mm hole. Made from pressed glass for Japanese-like uniformity of size and shape. Nearly 0% defect rate, with a large, smooth and regular hole and thinner walls (think Delica rather than seed bead) which allows more thread passes. Ideal for knitting, macrame, embroidery, kumihimo and so much more! Sold by the 12 grams (approximately 290 beads).