.flex-images
{
    overflow: hidden;
}
.flex-images .item
{
    position: relative;  

    float: left;
    overflow: hidden;

    box-sizing: content-box;
    margin: 4px;
}
.flex-images .item img
{
    width: 100%;
    height: 100%;
    border: 1px solid #dbdbdb;
    padding: 2px;
    border-radius: 3px;
}