How tall do you have to be to go with out a booster seat?

In the United States, children can typically stop using a booster seat when they reach a height of 4 feet 9 inches (57 inches) and are between 8 to 12 years old, although this can vary by state. It's important that the vehicle's seat belt fits properly, with the lap belt lying snugly across the upper thighs and the shoulder belt crossing the shoulder and chest. Always refer to local laws and safety guidelines for specific requirements.