Half-Round files are tapered in width and thickness, then coming to a rounded point. Cut on both sides. Measurements given are at the thickest point of the file.
Glardon Vallorbe® Swiss Made Precision Files are measured from the point where the teeth begin to the end of the file.
A 6" precision file will measure 8" long from tip to end of tang, but it is called a 6" file.