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.

Discover the method to accurately measure your feet for the perfect running shoe fit from home. Our specialists guide you through the process, step by step.

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.

It’s meant for measuring objects and that’s exactly what it does. When you need to measure something ‘in a pinch’, Ruler App is there. The makers of Ruler 2 are also having a contest - “In celebration ...

Researchers at the Max Planck Institute for Multidisciplinary Sciences in Germany have achieved a groundbreaking optical measurement of intramolecular distances with angstrom-level precision. Put ...