The pupillary distance (PD) measurement is a requirement for people who want to purchase eyeglasses. Here, find out how to measure your PD using a mirror and a ruler.

Instead, the tip of the ruler can be attached to the wall surface, etc., so if you want to use the ruler to 'measure the length and height of an object', the 'real ruler' is more suitable.

Constructions are accurate drawings of shapes using a ruler and protractor. From a sketch or a description, you may be asked to ‘construct’ a triangle ...

US-based innovators HOZO Design C.O. have launched an Indiegogo campaign for the “first compact digital rolling ruler.

The Y Ruler, developed by Yuan Design Studio, is multi-functional measuring set, inspired by the ancient Brass Goniometer. It has been redesigned to offer enhanced durability and precision ...