.sku-attr-list li {
    float: left;
    list-style: none;
    margin: 0 10px 3px 0;
}
.sku-attr-list li.item-sku-image a {
    width: 40px;
    height: 40px;
    padding: 0!important;
    overflow: hidden;
    text-align: center;
}
.sku-attr-list li a {
    float: left;
    border: 1px solid #e9e9e9;
    line-height: 28px;
    height: 30px;
    padding: 0 10px;
    color: #333;
    border-radius: 3px;
    background-color: #fff;
    text-align: center;
}

.sku-attr-list li.active a, .sku-attr-list li:hover a {
    border: 3px solid #f90;
    border-radius: 4px;
    line-height: 24px;
    padding: 0 8px;
    text-decoration: none;
}

.sku-attr-list li.item-sku-image img {
    max-width: 38px;
    max-height: 38px;
    display: inline-block;
}
.sku-attr-list li.item-sku-image.active a img, .sku-attr-list li.item-sku-image:hover a img {
    max-width: 34px;
    max-height: 34px;
}