<meta>mentioned in the CSS docs
.containerfor each grid tier with a single width, for example
width: 970px !important;Be sure that this comes after the default Bootstrap CSS. You can optionally avoid the
!importantwith media queries or some selector-fu.
.col-xs-*classes in addition to, or in place of, the medium/large ones. Don't worry, the extra-small device grid scales to all resolutions.