Huh, you'd have to get both shoe size and leg-length right.

The first Star Trek movie (Star Trek: The Motion Picture) had uniforms where the shoes were built into the pant legs. Apparently it was an enormous hassle getting them properly fitted and attached.

Quoting the Wikipedia article on the film:

>Combining the shoes and trousers was difficult, time-consuming, and expensive, as each shoe had to be sewn by hand after being fitted to each principal actor.