That's a description that most Americans can more easily picture than something like 0.68 mm (including people who are comfortable with metric units like myself

That's a description that most Americans can more easily picture than something like 0.68 mm (including people who are comfortable with metric units like myself) and they seem to be focusing a lot in recent years on making the information they provide more accessible to average Americans, undoubtedly to help drive interest in and support for what they're doing.