Placement requirements for icons

The placement of the icon must include a margin. The free space around the icon should be no less than 25% of the icon's height.

How not to place icons

Do not place icons on low-contrast backgrounds.
Do not change the icon's proportions or add anything to it.
Do not lighten the icon.
Do not change the icon's color.
Do not place text or other elements in the icon's margins.