Whether you can get away with a repair or need an entire replacement depends on the severity of the chip or crack and the location. Generally, if a chip is larger than a quarter or the crack is longer than three inches, we recommend a total windshield replacement. The location is also important to consider as a chip or crack can impede your vision when you're driving which is unsafe and actually depending on the state against the law. Your windshield actually moves depending on the changing temperature which causes cracks to spread so even if it is the smallest crack or chip it is important to have it looked at and repaired as soon as possible.