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Target size 0:39
A 39-second explainer of Target size, narrated over the same demo you can try yourself.
Try the interactive Target size demo
What this video covers
Target size is the size of a tappable or clickable element. If it’s too small or too crowded, people may miss it - due to larger fingers, limited dexterity, tremor, motion, or a small screen - and a control they can’t reliably hit is effectively broken. Space around a target reduces accidental activation, but that space isn’t part of the target unless it’s clickable too.
With the tiny targets you fumbled and hit the wrong one; size them up and the same task became effortless. Nothing changed but the box you had to land on. That margin for error - or the lack of it - is what target size buys, and it's invisible until it fails someone.