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. Share on Pinterest Some eyewear ...

Letter sizes — like S, M, L or XL — are essentially useless unless you know your measurements. Am I a Medium or Large? Why You Might Wear One Size from One Brand and a Bigger One from Another Products ...

A person can measure their height at home by using an object, such as a pencil, to mark a wall and measure the distance. However, it is often easier to measure height with help from another person.