#registro-form select{
    /*width: 100%;*/
    width: 387px !important;
    /*width: auto !important;*/
}

/* iPads (portrait and landscape) ----------- */  
@media only screen  
and (min-width : 768px)  
and (max-width : 1024px) {  
    #registro-form select{
        /*width: 200px !important;*/
    }
} 

/* iPads (landscape) ----------- */  
@media only screen  
and (min-width : 768px)  
and (max-width : 1024px)  
and (orientation : landscape) {  
    #registro-form select{
        width: 310px !important;
    }
}