【MIDORI】Stainless Multi Ruler (31cm) 42271006 
Our Selling Price: 1,800YEN(tax incl.)
The ruler is 31cm long, but can be folded in two when not in use and fit in a chest pocket or pen case.
The scale markings are laser-engraved to prevent them from wearing off.
The light yet strong aluminium-made ruler is ideal for use with a utility knife, too.