Anniversary 3-1/2" Rotating Pendulum Drive Movement Pendulum Is 2-5/8" High And 2-3/4" In Diameter. The Total Assembled Height Is 3-1/2". Case Size Is 2-1/8"W x 2-1/4"H x 5/8"Deep. Mounts Under The Clock Base With The Shaft Protruding Through The Base Hole. Off-Center Position Shaft, A Beautiful Ball Pendulum DOES NOT Regulate Or Run The Timekeeping.