What magnification do I actually need in a lighted makeup mirror?

For everyday application most reviewers find 5x to 10x is the sweet spot. Higher options like 20x or 30x (seen on several picks here) are useful for detail work such as brows, lash lines, and tweezing, but the very high magnifications have a narrow focal field and can be hard to use for full-face makeup. Many of the picks here are double-sided, pairing a 1x mirror with a magnified side so you get both.