And you buy the same brand and model of pants from the same retailer and they still fit completely differently due to variation in the product. Pretty annoying, I just want to buy my Levi's 510s every couple years and get the same thing each time.

yeah I dont buy pants without trying them on now, and usually still need to get them tailored. buying oversized shirts is fine online tho because if you get them a bit wrong in either direction its fine.