These Two-Hole triangle shaped beads are part of the Czechmates 2 Hole beading system, with the holes perfectly aligning with those of the other two hole beads manufactured by Starman (including the two-hole tile beads.) The bead holes are large and allow for multiple passes of beading threads. These beads are made in the Czech Republic from pressed glass and have a very uniform size and shape. They measure 6mm x 6mm and are 2mm thick. They are packaged in 8 gram packages which is about 70-75 beads.