New Upgraded Bed Guardrail: Three Size Optional: 59 /71?/79 lengths and 26 heights for added security. Before your order please measure your bed accurately. The height of the base can be adjusted from 0 to 9 inches (The height can be adjustable from 26 inches to 35 inches) to increase the adaptability and installation on different types of beds. It prevents children from climbing out and falling off the bed. It is recommended for children between 1 to 5 years old.