.social-icons i {

    font-size: 20px !important;
    color: #000;
    letter-spacing: 5px;
    background-color: white;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid b;
    padding-left: 16px;

}

#prova {
  
  font-size: 200px;
  
}