#gallery {text-align: center;width: auto;margin: 70px auto;}#gallery img {width: 250px;-webkit-transition-duration: 0.6s; -moz-transition-duration: 0.6s; -o-transition-duration: 0.6s; opacity: 0.6; z-index: 1; margin: 0; position: relative; }#gallery img:hover { -webkit-transform: scale( 2); -moz-transform: scale( 2 ); -o-transform: scale( 2 ); box-shadow: 0px 0px 25px gray; -webkit-box-shadow: 0px 0px 25px gray; -moz-box-shadow: 0px 0px 25px gray; opacity: 1; z-index: 10; }Live demo13Shares