What does 'two fingers width' mean in reverse parking?

[DelJoel]

Two fingers width is a colloquial expression, generally used to describe height, width, or depth. It refers to the width of two fingers, typically meaning approximately two to three centimeters. Below are specific explanations regarding reverse parking: 1. Definition: Reverse parking has been a mandatory test item for obtaining a small car driver's license since 2013. It assesses the driver's ability to maneuver the vehicle in a designated area. 2. Test evaluation criteria: Failing to follow the prescribed route or sequence results in disqualification. Having the vehicle body cross the line or failing to complete the parking maneuver leads to disqualification. Not completing the reverse parking within 210 seconds results in disqualification. Each instance of stopping midway deducts 5 points.