cropped square thumbnails with twitter bootstrap & css

cropped-thumbs

<!-- HTML -->
<div class="col-sm-6"> 
    <a href="#" class="thumbnail">
        <div class="caption">
            title<br/>3 x bekeken
        </div>
        <div class="image">
            <img src="" class="img img-responsive full-width" />
        </div>
    </a>
</div>


.image{
    position:relative;
    overflow:hidden;
    padding-bottom:100%;
}
.image img{
    position:absolute;
}

Padding top/bottom (like margin top/bottom) is calculated according to the width of parent element.As the .image div has the same width as its parent, setting padding-bottom:100%; give it the same height as its width so it is square (its content needs to be absolutely positioned or floated so it doesn't change the parent's size).