What is the length and width of common high and low beds?

The size of high and low beds has national standards, 2M long, 0.9M wide and 1.8M high (both are external diameters).

The height of safety guardrail for high and low beds with mattresses should be greater than or equal to 38 cm, and the height of safety guardrail for high and low beds without mattresses should be greater than or equal to 20 cm. The guardrail should not be too short, and the gap between the guardrail and the bedside should be 50-60 cm.