Make the target easy to hit

Why this rule exists

A control the user cannot comfortably hit is broken no matter how good it looks. Fingers are imprecise, cursors are hurried, and a button sized for a pixel-perfect click in a demo becomes a source of missed taps and quiet frustration in real hands on real devices. There are well-established minimum sizes for touch targets for exactly this reason, grounded in the size of a fingertip, and interfaces that ignore them punish the user for the designer's optimism. Spacing between targets matters as much as their size, because two small controls crammed together produce mis-taps that a little separation would prevent. Making things easy to hit is not a concession to clumsy users; it is respect for how bodies actually interact with screens, in motion, one-handed, distracted. The most beautiful control in the world has failed if people keep missing it.