Puzzle Ruler You may feel bored occasionally when in class or work. It’s not a right place for playing phone. You need something to do to cheer up at this time. Puzzle ruler, has got both practicability and entertainment. It can be used as a ruler when measure something; and it brings you entertainment effect when you need to kill time. Make your brain exercise, effectively mediate symptoms of drowsy and boredom. The ruler provides two kinds of scale, which make it have got a stronger practicability and wider usable range.   ・Dimensions: 15.5 cm x 6.5 cm x 1.2 cm ・Material: Plastic  ・Ruler Scale: 15cm ・Customization: color printing for single side, suitable for children ・Not only a ruler, but also a bookmark ・Small and exquisite, space-saving in pencil-case; a stationary gift for your different demands