.zoom {      
-webkit-transition: all 0.35s ease-in-out;    
-moz-transition: all 0.35s ease-in-out;    
transition: all 0.35s ease-in-out;     
cursor: -webkit-zoom-in;      
cursor: -moz-zoom-in;      
cursor: zoom-in;  
}     

.zoom:hover,  
.zoom:active,   
.zoom:focus {
/**adjust scale to desired size, 
add browser prefixes**/
-ms-transform: scale(2.5);    
-moz-transform: scale(2.5);  
-webkit-transform: scale(2.5);  
-o-transform: scale(2.5);  
transform: scale(2.5);    
position:relative;      
z-index:100;  
}