I'm wondering whether 'wide width' simply means 'wider across the toe box' or whether it also means wider at the heel. Shoes are always just a little tight where my fourth toe is, but often fall off the ends of my feet as I walk, especially heels.

Some extra info, in case it helps: 'Clarks' is an example of a brand that is wide enough for me, but falls off, even as a flat. 'Naturalizer' is another brand that does this.

Thanks!