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The sizes of icons, avatars, and touch targets are important considerations for minimizing driver distraction.
Generously sized touch targets make it easier and quicker for drivers to interact with apps and return attention to driving.
Guidance at a glance (TL;DR):
Use standard icon and avatar sizes for consistency
Minimum touch-target size is 76 x 76dp
Align and center icons and elements within touch targets
Icon sizes
Here are the standard icon sizes used by Android for Cars:
Primary icon
Secondary icon
Tertiary icon
44 x 44dp
36 x 36dp
24 x 24dp
Avatar sizes
Here are the standard avatar sizes used by Android for Cars:
Small avatar
Medium avatar
Large avatar
56 x 56dp
76 x 76dp
96 x 96dp
Aligning icons and touch targets
The minimum touch-target size in Android for Cars is 76 x 76dp. Touch targets must be large enough to be glanceable and easily selected by a driver while the car is in motion. Elements such as buttons should be centered within a touch target’s boundaries, and no part of an element should lie outside a touch target boundary.
Do
Keep touch-target sizes at or above the minimum 76 x 76dp requirement
Do
Center elements within the minimum touch-target area
Don’t
Don’t align an element to one edge of a touche target
Don’t
Don’t permit elements to fall outside of a touch target
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