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:


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

Publish your project

Movable Graduation / Ruler

Movable Graduation
Movable Graduation

When we use a ruler to draw successive line segments, in order to define where the next segment should end, there is always a need to relocate the 0 scale on the ruler, or to calculate the total line length.
By using the Movable Graduation Ruler, we can easily measure the next line segments by just moving the scale piece to the end of the previous segment.
It also avoids the inaccuracy caused by ruler removing when measuring line segments or graphics.
With the movable graduation ruler, even children and the elderly can easily and accurately draw line segments or measure the length without calculation.


Zhejiang University

Zhejiang University
hangzhou, China

Pan Yu


Zhejiang University

Zhejiang University
hangzhou, China