Today is very a fruitful day:) I have one more idea :) My thought is about free size footwear which can be suitable for everyone.

I think it may be done from a soft ribbon or better some new material. You put on a shoe and push a special button whitch starts on a special reaction, then soft and elastic material adapt to your foot and becomes more durable and protecting from sticks, peaces of class, stones and other things. The other button will spread in some substance to warm up the shoes in cold weather.

It can be finished in different colors with build bugles, buttons, zips, bows, laces and every thing you just can want :)

If you foot is getting longer you just restart first button and resize your shoes!