Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:

iF SOCIAL IMPACT PRIZE (free of charge)

Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project



The ruler is pen-styled unlike an usual ruler or a tapeline. It can measure a curved line or surface that are difficult to be measured by a regular ruler. If you draw or doodle on the paper with the pen-styled ruler, the distance that pen traveled will be measured by a circled sensor attached at the bottom of the pen and this will be shown on the head of the pen. It can be used variously in your life when you tailor clothings or measure a length of an object.


hoseo university

hoseo university
Chungcheongnam-do, North Korea


hoseo university

hoseo university
Gyeonggi-do, South Korea

Junkyoung Kim