.flex-images {
    overflow: hidden;
}

.flex-images .item {
    float: left;
    margin: .5px;
    border: 1px solid #eee;
    box-sizing: content-box;
    overflow: hidden;
    position: relative;
}

.flex-images .item img {
    display: block;
    width: auto;
    height: 100%;
}