I did a search and didn't find any thread on this topic. This has always bugged me, must be my OCD.
We all know the field is 100' long. The yard lines are measured from the front edge of the respective goal line. The yard lines are all 4" wide. This is all fine and dandy until you get to the 50' line. In order to maintain the measurements
from the goal line, the 50' line would need to be 8" wide, but it's not. Where do the extra 4" go?