These beautiful 99-bead plastic prayer beads are very durable. Each bead has Allah on one side and Muhammad on the other side inscribed with metallic silver in Arabic. We have 7mm tasbihs and 10mm tasbihs. The Imam has La ilaha illallah on one side and Muhammad “Rasulullah” on the other. This inside diameter of the 7mm tasbih is about 18-inches and the 10mm is about 24-inches. They come in gift boxes.