Just as a man might claim to have a nine-inch penis when it’s closer to a five-inch penis, he might also say he has plenty of space to park in a parking space only if he is measuring in dick inches. People use dick inches to make things sound larger than they actually are.
While there is no standard for measuring dick inches, some suggest that a dick inch is between 1 and 1.5 centimeters, compared to a convention inch which is 2.5 centimeters.