The Hand Call Bell is an essential tool for quickly gaining attention in various settings. Whether you're managing a classroom, leading a meeting, or organizing a community event, this compact and easy-to-use bell delivers a loud, clear sound that ensures you get noticed immediately. Perfect for both indoor and outdoor use, the Hand Call Bell helps you effectively communicate and organize group activities with ease. No. 2 bell has a 2 5/8" diameter; No. 6 has a 4" diameter.