.dimensione {
transition-duration: 1s;
-ms-transition-duration: 1s;
-webkit-transition-duration: 1s;
-moz-transition-duration: 1s;
-o-transition-duration: 1s;
transition-property: transform;
-ms-transition-property: -ms-transform;
-webkit-transition-property: -webkit-transform;
-moz-transition-property: -moz-transform;
-o-transition-property: -o-transform;
overflow:hidden;
}
.dimensione:hover {
-ms-transform: scale(2,2);
-webkit-transform: scale(2,2);
-moz-transform: scale(2,2);
-o-transform: scale(2,2);
}