sta-row--xs enables columns on any size.

sta-row--sm enables columns on any size greater than 576px - this is the default behaviour.

sta-row--md enables columns on any size greater than 768px.

sta-row--lg enables columns on any size greater than 992px.

sta-row--xl enables columns on any size greater than 1200px.

sta-row--xxl enables columns on any size greater than 1400px.