As I delve into learning HTML, I find myself curious about the possibility of combining multiple size types for width. For instance, is it possible to set a width that is both 10px and 3vw? While I understand that this isn't directly supported, I wonder if there might be a way, perhaps through typecasting or some other technique, to achieve this effect. Given my knowledge of the three primary sizing options - percentages, pixels, and viewport widths - could they be combined in a single width attribute to exert full control over the element's width?