Phi Ruler 2.0 (Clear version)
A multi-functional ruler that is designed to make sketching handy. With golden ratio grid lines, we can easily draw any linear lines, shapes and forms for harmony design. The transparent design is very easy for anyone at any level to sketch.
Pocket size: Height: 61mm | Width: 95mm
Medium: Height: 95 mm | Width: 148 mm
Large: Height: 122 mm | Width: 190 mm