* {
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.image-box {
    position: relative;
    margin: auto;
    overflow: hidden;
    width: 540px;
}

    .image-box img {
        max-width: 100%;
        transition: all 0.3s;
        display: block;
        width: 100%;
        height: auto;
        transform: scale(1);
    }

    .image-box:hover img {
        transform: scale(2.1)
    }