High Quality Material: these letter beads for bracelets making are made of acrylic plastic, high quality and durable. The round letter bead size is 4mmX7mm, and the hole is 1.5mm. The square letter bead size is 6mmX6mm, and the hole is 3.2mm, making it suitable for a wide range of threading materials. Bundle Items from my Closet for Amazing Savings! All orders shipped same day or next day depending on ordering time. Offers are always welcome!