Make all your icons the same width so they can easily vertically align, like in a list or navigation menu.
Add a class of fa-fw
on the HTML element referencing your icon to set one or more icons to the same fixed width. This is great to use when varying icon widths (e.g. a tall but skinny icon atop a wide but short icon) would throw off vertical alignment. For clarity in the following example, we’ve added a background color on the icon so you can see the fixed width and also bumped up the font-size of the parent element.
Skating
Skiing
Nordic Skiing
Snowboarding
Snowplow