Target Size (Enhanced)
The size of the target for pointer inputs is at least 44 by 44 CSS pixels, except when an equivalent target of that size exists elsewhere, the target is inline, its size is determined by the user agent, or a particular presentation is essential.
In plain language
This is a stricter version of the target-size rule: clickable elements should be at least 44x44 pixels — even bigger than the AA-level minimum of 24x24 — unless an equally-sized alternative exists elsewhere.
Why it matters
A larger touch target makes an even bigger difference for people with significant motor impairments or tremors, who may need a wider margin for error than the AA-level minimum provides.
In practice
Fails this criterion
A submit button is only 30x30 pixels, with no larger equivalent button offered anywhere else on the page.
Meets this criterion
The same button is at least 44x44 pixels, giving plenty of room for accurate tapping or clicking.
Test it yourself
Measure or visually estimate the size of the site's clickable buttons and icons. Are they comfortably large (about 44x44 pixels or more), or noticeably small and tight to hit precisely?