If you've spent any time researching shipping containers for a build project, you've probably noticed the term "high cube" popping up again and again, especially alongside the 20-foot size. It sounds like a small detail, but that extra height changes what's actually possible with a container, and for a lot of buyers, it ends up being the difference between a cramped conversion and a genuinely comfortable finished space. Here's everything worth understanding about the 20-foot high cube container before you buy one.