.wpcf7 input[type=submit] {
    padding:15px 45px; 
    background:#071811;
    color:#fff;
    font-size:20px;
    font-weight:bold; 
    border:0 none;
    cursor:pointer;
    -webkit-border-radius: 5px;
    border-radius: 5px; 
}

.wpcf7 input[type=text], .wpcf7 input[type=email], .wpcf7 input[type=url], .wpcf7 input[type=tel], .wpcf7 input[type=number], .wpcf7 input[type=textarea], .wpcf7 .wpcf7-select {
    font-size:17px;
    border: 1px solid #BEEEB2;
  padding:5px 5px;
}

.wpcf7 .wpcf7-select {
   width:100%; /* you can use pixels, em, rem, % to determine the width */
   font-size:18px;
}