this is the best ruler i’ve ever used.
every ruler should be clear, so you can see what’s underneath and whether you’re in the right place. 0 is directly on the left edge, as it should always be; it makes alignment much easier. and since a ruler’s length is defined by precise measurements, why not its width too? so this ruler is exactly 3cm wide, with a 1cm grid covering its surface, which helps for drawing parallel and perpendicular lines.
this ruler doesn’t just look good; its look informs its function. its look makes it vastly more functional, and you couldn’t have any of those useful functions without the beautiful look. it’s a harmony of look and function; that’s good design.