| Mobile websites are usually browsed with a thumb. And we need to be able to click elements with that thumb as well. Google Insights checks this under Size Tap Targets Appropriately. In the article Designing for Mobile Part 3: Visual design, Elaine McVicar mentions these numbers:
“Ideally, buttons should be between 44px and 57px on a standard screen and 88px to 114px on a high-density (retina) screen. This allows enough area for the average fingertip to easily activate a button.”
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