Most dress shirts and many button-downs are too long to look good worn untucked. Here's an assortment of Emmi-Approved shirts designed to be worn untucked. I don't do construction but I did hear something wise about having the right tool for the job. On a personal note I'm compelled to share that the flood of terrible "right length" jokes flooding my brain is almost overwhelming. Also do you think that's a good enough reason to take a valium? I do.