The period of a simple pendulum is T=2πsqrt(L/g), which means that the period of a simple pendulum is only related to the pendulum length, but not to the pendulum height.

However, it should be noted that the above simple pendulum period formula is suitable for small angle swing, in which case the swing of the simple pendulum is approximately simple harmonic vibration.

When the amplitude of the pendulum does not meet the condition of small angle, the simple pendulum is no longer a simple harmonic motion, a periodic motion, and there is no periodicity.