450 Blue Acrylic Letter Beads with White Letters. These Acrylic Letter Beads Measure 6mm or 1/4 Inch - This is Our Small Size. Each Acrylic Letter Bead Has a 3. 4mm Hole. This Bulk Value-Pack of Acrylic Letter Beads Come in Randomly Mixed Letter Assortments. These are Great Craft Quality Acrylic Beads for Jewelry Making, Beading, Necklaces, Bracelets and Craft Projects.