當我們忘記帶尺的時候，我們習慣用其他的物品代替尺來幫助我們畫線，像是另外一支筆或是筆蓋，甚至是橡皮擦。這種無意識的行為啟發了「尺筆」這個概念，變延長的筆蓋成為了尺，與筆結合為一體，不但解決了人們會忘記帶筆的問題，也同時給了筆新的外觀。 While we forgot to bring the rulers, we used to use other things which could help us draw lines instead of rulers, such as pens, caps of pens, or even erasers. This unawareness behaviour inspired the concept of “Ruler Pen”. The cap is extended, and be made it into a ruler, solving the problem of forgot to bring ruler and giving the pen a new appearance at the same time.