Compared to other Two-Hole Tile Beads on the market CzechMates Tile Beads are more durable and have OVER 2x larger holes allowing for multiple passes of beading threads. These glass square beads are made in the Czech Republic from pressed glass and have a very uniform size and shape. The corners are softly rounded and will not cut into your skin or thread. See for yourself. These Czech glass tile beads measure 6mm x 6mm x 3mm and have two parallel holes each measuring 1.25mm in diameter.