Most container conversations revolve around 20 and 40-foot sizes, but there's a middle option that often gets overlooked entirely: the 30-foot shipping container. It doesn't get the same spotlight, largely because it's less common in the shipping industry itself, but for certain projects, it hits a sweet spot between space and manageability that the more popular sizes can't quite match. Here's a full look at what makes this size worth considering, and what to know before buying one.