based on http://www.wearesicc.com/quick-tips-5-column-layout-with-twitter-bootstrap/ , modified for fitting 5 columns in any >320px width displays.
.col-xs-15, .col-sm-15, .col-md-15, .col-lg-15 { position: relative; min-height: 1px; padding-right: 10px; padding-left: 10px; } @media (min-width: 320px) { .col-md-15 { width: 20%; float: left; } }
And use it like this:
<div class="col-md-15 col-sm-3"> ... </div>