Specify label width for checkbox

I'd love to be able to specify a label width in pixels or percentage for the checkbox components, the same way I can for input components within a form. It's frustrating having a form laid out nicely with all of my inputs aligned vertically but not being able to line the left edge of the checkbox up with the left edge of the inputs above it. It just looks bad. I can sometimes cobble something together by getting creative with text components, containers and padding and margin setting, but even then, it rarely lines up perfectly.