Bugle beads (size 20 mm), or (16 mm) in length (SQ HOLE). Are manufactured by Preciosa a traditional Czech Republic company, considered a world standard glass bead manufacturer known for their range of precision-cut, crystal glass and related product beads, est. in the 1940’s. The quality and durability of Czech Seed Beads far exceeds that of other manufacturers. For crafting and beading creations. These bugle beads are tubular and slim in shape created to enhance many accent design possibilities. Approximately (28-30) GR/TB each color securely tubed in 6"X 1/16" inch-clear containers. 20 mm = .78 Inch / 16 mm = .62 Inch. Approximately 1 mm hole.