Yes those from Asia average 4”, in the US I believe it is 5” but down in Jamaica the rolls have a 7” circumference.
You’re talking about the cardboard tubes, but what about the actual roles of sheets? Nowadays I’m noticing that in the paper products aisle there are big rolls, giant rolls, and recently even mega rolls. Have I been stocking rolls that are too small, compared to other guys’ bathrooms? Are women less likely to come over - and stay - if I have smaller rolls that are more prone to running out on them, now that they have seen that there is bigger available? We all know women use a lot more toilet paper, so they must prefer the bigger rolls, right?