Was browsing YouTube for videos on Japan, and found this:
Summary: a young woman, probably Canadian, spends five minutes explaining how women in Japan deal with their periods.
Was amused to learn that pads are described (at least in part) by a number referring to their length in millimeters. At around 2:27 into the video, she introduces the “420”, which is - yes - 420 millimeters (16.5 inches) long. Seems like that would pretty much reach from the front waistband to the rear waistband. :eek: