About label size, I don't think the label should be that big anyway. On an input, there is an option for explanatory text under the input element. At least in

About label size, I don't think the label should be that big anyway. On an input, there is an option for explanatory text under the input element. At least in Material-UI. So with proper responsive design, the input should expand with the label text size, and the label itself should be short, with the necessary explanation on the bottom.