They could get a taste for it by watching Married with Children.

Walmart has shit shoes in the store, of course, but I shop for shoes on their site, because if the size is wrong I can return them at the store, and they are very close to me.

It's surprising that shoe sizes aren't more standardized, I mean the narrow to wide sizing. Some of them I can wear normal and some of them I need extra-wide. That's how far off it is.